I mean I had that problem, especially when I did multiplayer videos and it is very hard to break from because your mind is like super focused on it. I've watched people play multiplayer matches and when they do they tend to speak in small sentences which I guess is better than not speaking at all. My only recommendation is either to relax and not be so serious or try recording something else that isn't so heated. If you can, try to at least speak in short sentences if you are in a heated situation. At least it would give people someone to listen to and doing this overtime may solve your problem.