YouTube Channels Crippled By Copyright Claims

In some cases the Game companies have legit concerns. If you stream a video of you playing Dance Dance Revolution with audio captured of Britney Spears entire song, you basically just posted a song to the web, likely at CD quality (if you did your capture correctly).

A capture of a Lord of the Rings game would include the soundtrack from the movie, a similar problem to above.

Then you have the voice overs, Call Of Duty had Ice T, Or Ice Cube, or Vanilla Ice (I forget which one) give you inspiring advice through out the matches, based on if you are winning or losing. Likely the franchise doesn't have a license to give you to include that in your video.

If you are running ads on the content, and Battle Field X was in front of your glitch video it is hard to argue that you were evangelizing the Call Of Duty games, so CoD has little reason to pony up for the license either.

Google has been warned plenty of times about this. They just don't care. They're instead making it ever easier to file mass bogus takedowns to more and more channels at once to appease Big Content.