CPU high. What will help?

New update and my cpu usage seems to have gone up and then Zoom calls won’t go higher than 640x480. In Settings->Desktop, I have Accelerated Capturing turned on. “Capture Hardware Accelerated Windows” has very poor documentation. What does this do? Will it release some strain on my CPU if selected? The same thing with “Asynchronous frame transmission” in the “General” settings.

Can someone reply? I’m wondering the same thing and having the same issue.