You can find my Friday response to this issue on our forum here:
https://linustechtips.com/main/topic/1033873-updated-claim-has-been-removed-the-linux-gamers-response-video-to-ltt-got-claimed-by-fullscreen/?page=3&tab=comments#comment-12302881
Alternately, once YouTube gets this video fixed for me, you can hear a much more in-depth discussion of the changes to ContentID and the DIFFERENCE between a DMCA Takedown (resulting in a Copyright Strike) and a ContentID Claim here:
https://www.youtube.com/watch?v=Zzu1-VM7y6g