I found this channel recently and have found it to be a gold mine of insight and tips on composing for film.  Just thought I'd share.

Does anyone know of any similar channels that are more game music specific?

I don't know of any game music specific channels, but I find Rick Beato's channel similarly educational.

Great thanks!  Looks like some useful music theory on there.

Yes, Rick Beato's channel is amazing. Highly recommended! Here are the other ones I listen to often: 

UBK Happy Funtime Hour - http://www.ubkhappyfuntimehour.com/

Adam Neely - https://www.youtube.com/user/havic5

Jeff Schneider - https://www.youtube.com/user/JSchneidsMusic

I also listen to Rick Beato's channel and actually do Patreon for all of these because I get so much out of them.