If you have ever had black borders appear in your Youtube videos this video will show you how to get rid of them without having to reupload the entire thing Original Youtube Blog post www.youtube.com The 4 different lines of code are yt:crop=16:9 (zooms in on the 16:9 area, removes windowboxing) yt:stretch=16:9 (fixes anamorphic content by scaling to 16:9) yt:stretch=4:3 (fixes 720x480 content that is the wrong aspect ratio by scaling to 4:3) yt:quality=high (default to a high quality stream ...