Is there a way to link a youtube video so that it plays automatically in HD?
I've tried several things (adding &hd=1, &vq=hd720) but none of them works
For example: https://www.youtube.com/v/BH_lZSTYFHs&hd=1
It starts always as 480p, it does not care apparently about the hd=1 parameter in the url
Nick Vogt at H3XED posted this syntax: https://www.youtube.com/v/VIDEOID?version=3&vq=hd1080
Take this link and replace the expression "VIDEOID" with the (shortened/shared) ID of the video.
Exapmple for ID: i3jNECZ3ybk looks like this: ... /v/i3jNECZ3ybk?version=3&vq=hd1080
What you get as a result is the standalone 1080p video but not in the Tube environment.
Source: Stackoverflow.com