How much does a video weigh? - Michael Stevens of Vsauce
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0:14 - 0:18Bean bags are awesome.
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0:19 - 0:23But I see a few people out there
who are standing, -
0:23 - 0:25we've got some over here,
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0:25 - 0:28and standing takes more
work than lounging. -
0:29 - 0:33Using the Live Strong
Organization's online database -
0:33 - 0:35of weight loss resources,
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0:35 - 0:36you can calculate
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0:36 - 0:39that by the time I'm done
with this speech, -
0:39 - 0:40those of you who are standing
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0:40 - 0:45will have burned 7.5 more calories
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0:45 - 0:47than those of you who are bean-bagging it.
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0:47 - 0:49(Laughter)
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0:49 - 0:51Okay, here's a question,
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0:51 - 0:54speaking of weight loss,
specifically weight, -
0:54 - 0:55this speech is live.
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0:55 - 0:57I'm actually here in front of you guys,
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0:57 - 0:58we're all here together.
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0:58 - 1:00But this speech is being recorded
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1:00 - 1:04and it will become a video
that people can access all over the world -
1:04 - 1:06on computers, mobile devices,
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1:06 - 1:07televisions.
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1:07 - 1:11I weight about 190 pounds.
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1:12 - 1:16How much will the video weigh?
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1:18 - 1:20Asking questions like that
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1:20 - 1:23is what I do every week
on my channel Vsauce. -
1:23 - 1:24For the last two years,
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1:24 - 1:27I have been asking really fun questions,
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1:27 - 1:28mind-boggling questions,
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1:28 - 1:31and approaching them
as sincerely as I can, -
1:31 - 1:34celebrating scientific
concepts and scientists. -
1:34 - 1:36And I research and write
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1:36 - 1:37and produce and host
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1:37 - 1:39and edit and upload
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1:39 - 1:41and run the social media all by myself,
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1:41 - 1:43but it's not lonely,
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1:43 - 1:46because Vsauce has
more than 2 million subscribers, -
1:46 - 1:50and every month, my videos are seen
by more than 20 million people. -
1:51 - 1:52Yeah.
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1:52 - 1:54(Applause)
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1:54 - 1:56It's very exciting.
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1:56 - 2:02I've found that asking a strange question
is a great way to get people in, -
2:02 - 2:04not just people, but fans.
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2:04 - 2:07And fans are different
than just viewers or an audience, -
2:07 - 2:09because fans want to come back.
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2:09 - 2:11They subscribe to you on YouTube
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2:12 - 2:14and they want to watch
everything you've made -
2:14 - 2:16and everything you plan
to make in the future -
2:16 - 2:18because we are curious people
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2:18 - 2:24and sparking curiosity is great bait.
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2:24 - 2:26It's a great way to catch a human.
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2:27 - 2:28And once you've caught them,
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2:28 - 2:31you have this captive
audience that you can, -
2:31 - 2:34with the goal in mind
of answering the question, -
2:34 - 2:37accidentally teach a lot of things to.
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2:37 - 2:39So, let's take a look
at some of my videos. -
2:39 - 2:40Here are eight of them.
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2:41 - 2:43But down here in the lower-right corner,
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2:43 - 2:45"What Color is a Mirror?"
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2:45 - 2:47When people see that,
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2:47 - 2:49it's very difficult not to click,
because you think, -
2:49 - 2:50"Come on, are you serious?
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2:50 - 2:53How could you possibly
answer that question?" -
2:54 - 2:58Well, so far, 7.6 million
people have watched -
2:58 - 3:01this five-minute video
about what color a mirror is. -
3:01 - 3:03And in that episode, I answer the question
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3:03 - 3:07and I get a chance to explain
what would normally be kind of dry topics: -
3:07 - 3:08optics,
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3:08 - 3:10diffuse versus specular reflection,
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3:10 - 3:13how light works,
how light works on the retina, -
3:13 - 3:14and even the etymology of color terms
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3:14 - 3:16like white and black.
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3:17 - 3:19Okay, spoiler alert:
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3:19 - 3:21mirrors are not clear,
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3:21 - 3:23they are not silvery,
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3:23 - 3:25like they're often illustrated.
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3:25 - 3:26Mirrors, technically speaking,
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3:26 - 3:28are just a tiny, tiny, little bit ...
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3:29 - 3:31green.
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3:31 - 3:34You can demonstrate this
by putting two mirrors next to each other, -
3:34 - 3:36facing so they reflect
back and forth forever. -
3:36 - 3:39Look down that infinite reflection,
and it will get dimmer, -
3:39 - 3:43because some light is lost
or absorbed every time, -
3:43 - 3:46but it will also become greener,
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3:46 - 3:48because green light,
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3:48 - 3:51that is light of a wavelength
that we perceive as green, -
3:51 - 3:54is best reflected by most mirrors.
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3:54 - 3:56Okay, so, how much does a video weigh?
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3:56 - 3:59Well, when you stream
a video onto your computer, -
3:59 - 4:02that information is temporarily stored
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4:02 - 4:03using electrons.
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4:04 - 4:09And the number of electrons on your device
won't actually increase or decrease. -
4:09 - 4:12But it takes energy
to store them in one place, -
4:12 - 4:15and, thanks to our friend Albert Einstein,
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4:15 - 4:17we know that energy and mass are related.
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4:17 - 4:18Okay, so here's the thing:
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4:18 - 4:20let's say you're watching a YouTube video
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4:20 - 4:23at a really nice resolution, 720p.
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4:23 - 4:25Assuming a typical bit rate,
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4:25 - 4:30we can figure that a minute
of YouTube video -
4:30 - 4:36is going to need to involve
about 10 million electrons on your device. -
4:38 - 4:41Plugging all those electrons
and the energy it takes to hold them -
4:41 - 4:43in the correct place
for you to see the video, -
4:43 - 4:44into that formula,
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4:45 - 4:47we can figure out
that one minute of YouTube video -
4:47 - 4:51increases the mass of your computer
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4:51 - 4:55by about 10 to the negative 19th grams.
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4:55 - 4:57Written out, it looks like this.
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4:58 - 4:59(Whistle)
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4:59 - 5:00That's like nothing.
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5:01 - 5:04You could call that nothing,
and you wouldn't really get in trouble, -
5:04 - 5:07because the best scales
we've ever invented -
5:08 - 5:11that we could try to use
to actually to detect that change -
5:11 - 5:13are only accurate to 10
to the negative 9th grams. -
5:14 - 5:15So, we can't measure it,
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5:15 - 5:18but we can, like we just did,
calculate it. -
5:18 - 5:20And that's really cool
because when I was a kid, -
5:20 - 5:25my school had two shelves
of science books. -
5:25 - 5:26That was really cool,
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5:26 - 5:29but I read all of them
within, like, two grades, -
5:29 - 5:31and it was hard to get more books
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5:31 - 5:33because books are heavy,
you need space for them -
5:33 - 5:36and moving books around is tougher
than what we can do today. -
5:36 - 5:37With numbers that small,
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5:37 - 5:40I can fit thousands of books
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5:40 - 5:43on my own little personal
electronic reader. -
5:43 - 5:45I can stream hours and hours
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5:45 - 5:47and days and days of YouTube video
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5:47 - 5:51without my computer
ever getting measurably heavier. -
5:52 - 5:54And as information becomes that light,
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5:54 - 5:56it becomes a lot more democratic,
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5:56 - 5:58meaning that more teachers
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5:58 - 6:04and presenters and creators
and viewers than ever before -
6:04 - 6:05can be involved.
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6:07 - 6:08Right now, on YouTube,
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6:08 - 6:10there is an explosion
of content like this happening. -
6:11 - 6:13The three Vsauce channels
are down there in the corner. -
6:13 - 6:16But everyone else,
all together, collectively, -
6:16 - 6:18their views dwarf what I can do alone
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6:18 - 6:20or with the people that I work with,
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6:20 - 6:22and that is really, really exciting.
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6:22 - 6:25It turns out that tapping
into people's curiosity -
6:25 - 6:28and responsibly answering their questions
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6:28 - 6:32is a brilliant way to build
fans and an audience -
6:32 - 6:33and get in viewers.
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6:33 - 6:37It's even a great way
for brands and companies -
6:37 - 6:38to build trust.
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6:39 - 6:43So, calculating the weight of a video
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6:43 - 6:45is kind of a funny question,
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6:45 - 6:52but I cannot wait to see
what we ask and answer next. -
6:52 - 6:54As always, thanks for watching.
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6:54 - 6:55(Applause)
- Title:
- How much does a video weigh? - Michael Stevens of Vsauce
- Speaker:
- Michael Stevens
- Description:
-
View full lesson: http://ed.ted.com/lessons/how-much-does-a-video-weigh-michael-stevens
What color is a mirror? How much does a video weigh? Michael Stevens, creator of the popular educational YouTube channel Vsauce, spends his day asking quirky questions like these. In this talk he shows how asking the right -- seemingly silly -- questions can make incredibly effective lessons.
Talk by Michael Stevens.
- Video Language:
- English
- Team:
- closed TED
- Project:
- TED-Ed
- Duration:
- 07:21
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Krystian Aparta
The English transcript was updated on 2/13/2015.