If you need to record your Zoom with no lag, you can try some other good screen recording tool such as OBS. It is free and powerful. But for me, it is a little complex. You can try it and check if it meet your need. And some paid screen recorder are more easy-to-use, such as Bandicam, Camtasia, FlashBack, RecMaster and so on. If you want a free one, just ignore the second half of my answer.