I dont think this is possible, as they would basicly have to "hack" or access your pc from the server, or have a spectate bot in everygame and lobby to record your point of view. Also, if it possible it would take ages to get it done, and then movie maker inside of cubecraft? That just wont work.
I understand that your computers cant handle a reconding software such as OBS or Bandicam, but this just isn't the solution. If you have windows 10 then you can record your screen by pressing "WindowsKEY + G" while having your game open, and there are pretty good video editors out there even for free. And if your pc cant handle a video editor then, if you have a phone or tablet, install a video editor there. A good video editor in my opinion that i have used in the past is, CuteCut which the free version has a watermark but the Pro version is really cheap and has no water mark.
Or else, if its just for reporting players get a simple cutter and joiner software which there are plenty of.