Not really. We don't want people to just use PC as some sort of platform to advertise their YouTube channels or whatnot, so there's no threads for that nor do we want people to make posts that do nothing other than promote their stuff.
However, we allow people to link to their channels and pages in their signatures, so go ahead and do that if you want. We do also allow people to share their content in the appropriate sections so long as they directly put the content into the post and don't just provide the link and tell people to go there.