Awesome! Sorry bout the little outtakes on Youtube celebs, it's just what we do around here lol..
And very well made videos.. great to have you onboard. I think the community would most appreciate linkbacks, vid description shoutouts, or even in video. For one, you can build and engage with your community around here (how awesome is it to be able to reward your most engaged subscriber?) and openly use the STEEM logo in your videos if you wish to (I've been openly using the STEEM logo for my music event posters just as a way to contribute back in other ways).
I've also sent emails to gabe newell about accepting Steem (they've been accepting bitcoin) and overhaul their games review section to allow for steem votes in the future. But I was just trying my luck more than anything. Steem and steam together is just too steemy. He never replied.
YouTube unfortunately doesn't play well with linking outside sites. If you do, you can kill traffic on your channel instantly since your video would be drawing traffic off YouTube. They seem to be okay with things like Patreon and crowdfunding sites (funding to support creators and further video development) but not very much else.
Just drawing some small chunk of traffic away from YouTube isn't a really great answer anyway because you'll end up having the viewers go back immediately. It's way more important to offer better and unique content on Steemit not found anywhere else.