Zoom high RAM usage just after startup, not in meeting.

Screenshot taken before zoom was launched, system idle.

System RAM usage 829 MB.

Screenshot taken after zoom was launched and finished loading, system entered into idle, zoom NOT signed in.

Zoom RAM usage 137 MB, system RAM usage 1.3 GB.

Screenshot taken after zoom was closed, system entered idle.

System RAM usage 829 MB.

Screenshot taken after zoom was launched and finished loading, system entered into idle, zoom SIGNED in.

Zoom RAM usage 822 MB (5x increase), system RAM usage 2.2 GB.

I upgraded to zoom one pro on 25th April. I had my first zoom meeting today and it ended after 40 minutes even though on zoom one pro there shouldn't be a time limit. I have a meeting tonight and cant have it end after 40 minutes. Can anyone help please?

There's something Zoom does that really bugs me and I don't know if there's a fix. When I record a video to my computer, there's a box that shows the progress of the video conversion. But that box stays on top and blocks everything I'm working on. Is there a way to get it to appear in the back or something?

I'm using a 2022 iMac with the latest OS. 

For years I have been using Zoom to teach and share my slides, clicking on Share - Advanced - Powepoint as a backgroung. And since last week this option is not available on my PC, but it is available on my macbook. I have updated my zoom account and my Powerpoint and I am still unable to use this option that it was available before.
I like this option because then I have control of my position and size in front of the slide as I need to demonstrate different aspects. 
Please help!