I use VideoProc to download YouTube videos during my free-bandwidth period and view them with VLC at a more convenient time. (AKA - after coffee). It offers a series of formats. I have been selecting the file with the most MB for music videos, and the least MB for junk files.
Probably because I do not speak Geek, I cannot find a chart that tells me what I have gained by the choosing the file with the most MB for music - and what I have lost by choosing the one with the least MB.
I would like to either confirm what I am doing is what I want to do. Or make more intelligent selections of which file extension to download.