Niche Website Promotion with Youtube!

Just a quick question for the youtube gurus out there.

Forgive me if this thread doesnt make sense Im on percocets for ass surgery on monday.

When marketing a niche website on youtube do you typically have an account per website or do you just have a very general account with videos about everything in it???

eg.
exercise site - exercise youtube account customized to website
dancing site - dancing youtube account

or

general account - exercise video, dancing video etc etc.

Any help is appreciated.

you need to have each video for each niche/product. The more targetted the better.

but with the new google account bs with youtube how do you go about getting a targeted account per site??

Account per site is best. Niche can be to be and not worth risking putting all on one acc/

but you need a pva to upload videos do you not?? so if I have 50 niche sites how can I get 50 pvas with account names similar to my niche topic?