Okay, so for Youtube Avi is useless, and MP4 is the way to go (compressed to H.264) ?

Also i wanted to know, if I put an the same video, one is Avi format and the other is MP4, the final render will look the same as it uses Sony Vegas render configuration right ?

I just wanted to know, which format is better ? Avi, Mp4(MP4 make my game bug so dount count it) or Mp4NVENC ? Also is it better to export Avi to MP4NVENC then put it in Sony Vegas or directly record with MP4NVENC format ? I also noticed that when I render Avi with Sony Vegas, the final render looks...