I have four different channels right now - the Booktube channel is the main one I've posted videos to. . . . about books. There are a lot of readers posting Booktube videos on YouTube, and we get to know each other and leave comments on each others' videos so it really is a form of visual social media.
I'm putting arts and crafts videos on another channel, and am going to have a travel channel, which has only one video on it right now. The links to my channels are in the side column on my blog. The blog link is in my profile here.
I consider video making a great hobby and part of the reason I do it is to keep myself young... well, I've heard that as we age it is important to keep doing new and challenging things and learning more - and video making fulfills that purpose for me. Also, I'm doing this for my descendants thinking they might like to know who I was in case these videos are still online many years from now. I do that because my ancestors left very few clues as to who they were and I don't want to do the same.