How to sync "pc game recording" and "usb camera recording"

hiciper

Prominent
Apr 28, 2017
3
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510
How to sync "pc game recording" and "usb camera recording" where they start at the same actual moment. In order to merge these two videos (at a same frame) to obtain a single video.

If i use a "gameplay recording software to record the game in video format" and "visualizing my pyhsical mouse by a simple camera recording" to just obtain a visual proof If I had great visible amount of LAGs.

If there is a single software doing this, I would appreciate the name.

May sound odd (or even be odd, and is beyond my comprehension right now) but just my camera is not so good, I intend only to record the mouse with it.

Thanks for your attention!