tag yt:stretch=16:9 for you tube video to stretch background

[RobLucci]

i saw a tutorial in youtube that teach you how the background fill the entire screen without re-uploading by typing yt:stretch=16:9 in the tag.

first i thought that this will also help me to upload videos with the background fills the entire screen but when i try it. it didn't quite work. sometimes the background only stretches horizontal with black layer in above and below. sometimes it stretches vertically only. if you know any same method can you tell it to me? or do i need to adjust the ratio?

[RaveComing]

Stretching is horrible since (considering it worked properly and not only add black lines) it would distort your image, sometimes beyond recognition. If I were you, I'd consider either not giving a fuck or completely redoing your entire video with pre 16:9'd images

[Watch4FallingRock]

I remember trying this, but it didn't seem to go right for me.