No need to ask. Just make one.
BTW we might never get this collab support if we have to teach people how to make every gamemode for every category. It would be possible to have a single video/ short series of videos to cover mapping for the other gamemodes.
If you guys make a video, post it here. It doesn't need to be perfect, but make sure you cover all the basic elements related to the topic you are making. Some of the topics are very simple. It doesn't take an expert to record a video on how the game works and as long as people can reasonably understand what you are saying and you aren't stumbling over your words all over the video an accent likely will not be an issue. We can add subtitles if necessary.
(If you ask me, the people who need these guides most are people who don't know English that well). They may understand the subtitles better.