YouTube introduced high quality videos streaming by placing a link as listed here under each played video:
You will see this link first in black: Watch this video in higher quality.
Then after clicking on the previous link you might see this second link: Watch this video in lower quality for faster playback.
Now, you might ask who will click back on the second link and return to lower quality video?
Probably the low Internet bandwidth connected people.
You might also ask, would it be possible to embed high quality videos on a third social network site?