Yes, I like the idea, I am happy with it.
I will not do it on my own, nor support. I will answer any question or give my opinion when requested. No problem.
I think the best would be if more than one person took care of the accounts. I like the idea of the combo youtube + fb + insta. I am not sure how automatic it could be (that sharing in one is shared in the others platforms), but if quite automatic then it is easier to do it.
About re-posting material that is not yours. Please keep in mind Ezra tried the Diabolo Europe initiative in Instagram but they closed it given little or no reason at all.
Unfortunately just by posting here you automatically become the best candidates to do it. So if you do not want the responsibility you better think of why you would like to see it, but why you would not like to do it on your own.