Help with platform videos

Hi there. New Retrobat user here and I truly LOVE the awesome work you guys have done on this front end!

Former Hyperspin and Launchbox user so this is very new to me. I'm trying to add game system/platform videos to each of systems. I'm using the theme Hypermax if that helps, but I've searched on YT and practically everywhere I can, but haven't found an answer. In which folder/directory would I add the videos to show up on each game system?

Any help would be most appreciated.

Anyone have any ideas here? I've been banging my head against the wall trying to get this seemingly simple thing to work. Is it something I need to change/edit in one of the .cfg files?

Ok, I finally figured it out. It was set to "Custom Video" in Theme Configuration. When set to No Video, it chooses a random game video for that system, which is fine with me