If you have not already checked it out, Google plus is a fantastic way to share content, have discussion and build community. Google+ is also now now integrated with YouTube bringing your video content directly to your network. I have been on Google+ for a couple of years now and I have seen its format and layout improve a lot since Google launched it.
A great feature of Google+ is the communities. You can create a community of your own and invite people to join. Then you can share all manner of content and discuss.
I started the Cajon Players on Google+ community a while back and now it seems to be hotting up with many new members and great content. If you have something to share and want to engage in good discussion, we, in the cajon community would love to see you there.