Page 43 - How It Works - Book Of Amazing Answers To Curious Questions, Volume 05-15

Technology

The journey of a YouTube video 1 billion

What happens to your video once it has been uploaded? people regularly
use YouTube to
Uploading Downloading watch and upload
videos
Uploading Click play
1 Once you hit Upload, 1 When someone
YouTube copies your video clicks to play your
into several different fi le video, a request is sent
formats with differing over the internet to
levels of video quality. YouTube’s servers.

Video packets
2 Each version of the
video is then chopped up
into several different
pieces called packets. Video
2chopped up
300 YouTube selects the
hours of video best video format for the
are uploaded to browser being used to
view it and chops it back
YouTube every into packets.
minute
Wireless
3transmission
The packets are then Reassembly Over Buffering
encoded as radio waves 5and storage 700 5 If the internet
which are sent over Wi-Fi YouTube’s servers YouTube videos connection is slow, the
or a mobile network. receive the packets, video may buffer when
reassemble them into are shared on waiting for the next
a video and store it at Twitter each packet to be delivered.
Google’s data centres. minute

Delivered
4to YouTube Delivered to the Instant
When the signal 3viewer 4playback
reaches a cell tower The packets are sent via The packets are delivered
or router, it is wired and wireless in order to form the
transmitted via a connections to the original video at the
wired connection to viewer’s computer. optimum quality.
YouTube’s servers.

3D YouTube videos The live streaming service enables people all over the
must be viewed world to watch events as they happen
with special
coloured glasses

Spherical videos can be used with VR headsets,
offering users 360-degree panoramas

2009 2010 2011 2012 2014 2015
Users can now upload and YouTube keeps up with YouTube’s Sliced Bread The live streaming service Support for videos that Spherical videos can now
view up to 1080p HD technology and includes project enables videos to is improved, enabling over play at 60 frames per be uploaded, enabling the © Rex Features; Thinkstock
footage. Support for 3D support for ultra-high be sent to your device a 1,200 events during the second (fps) is added, viewer to see a scene from
videos is also added for a definition 4K videos to be little bit at a time to help London 2012 Olympics to be which provides much absolutely any angle of

better viewing experience. uploaded to the site. prevent buffering. watched live. smoother playback. their choice.
How It Works 43