First of all, we did not share any information during combat, so this is not metagaming. Second, the fact that we were talking in the background in the video doesn't matter because our voices did not reach the game. If the voice didn't go into the game, it does not count as metagaming according to the game rules. Third, you are playing background music in the game and can't even hear yourself properly. Instead of blaming others, maybe you should look at your own mistakes first. The more you talk, the more you sink, so stop struggling for nothing.
