I couldn't find a direct response for this. I've seen a few individuals mention that it helps, but I was curious how crucial is it? I rank videos that have just an image as the "video" and they play a demo track for the product they are advertising. I have been ranking fairly well on YouTube though these videos are 720p (max). I still can't seem to jump to the #1 spot, so with other factors put aside, could not rendering my videos in 1080 potentially harm my rankings so much so that I should redo them? Thanks in advance!