Okay, that makes sense. If you used QuickTime I think there is an option to export with resizing and higher compression for longer videos, but your confirmation of having tried with a delay is good enough.
Hopefully the weird trick of using the bottom left corner suffices. All of this seems a bit like black magic at times.
I’d also, if you do so, temporarily disable any utilities that might augment or modify trackpad behaviour (BetterTouchTool, Keyboard Maestro, and the like), to see if that makes a difference.