I know some of the older canons and nikons shot ok video but short segments and the audio was well not worth using. Some have an external mic input that could be a solution to audio problems if that is the issue. I can't speak about software issues, I have only used Avid and final cut but not often nor is it something you need to use for utube Overkill!!

There are a number of ok video cameras out there the sony flip series has produced reasonable video and ok audio. I don't work with video much film mostly. I do know that the film guys I know often recommend them to friends and family.

I don't know any film crew whom uses a Dslr camera that is in the same class as a canon T1 or 2. Loosely I guess you could say that but things like the RED and HDW really have nothing in common. I can't say about the amateur crowd.