Hello! I need help understanding the video resolutions that are possible to obtain with zoom, with different plans and settings.

At the moment I have a free plan, and my video resolution, both sent and received is 640x360, 26fps (verified in the Statistics of the meeting).

My camera resolution is  1280×720 with 30 fps.

My goal is to have a better resolution for my one on one video calls (two people total in the meeting).

I've been told by the support that there was no way to obtain a higher resolution than 640x360 on one-on-one calls, independent of the plan.

However, I read in here https://support.zoom.us/hc/en-us/articles/207347086:

"For the time being, standard video, not HD video, will be activated when 3 or more participants join a group meeting. HD video (720p) will be activated for 2 participants "

So it seems that, for free plans with no special settings, we can get 720 for 2 people, but it will be reduced to 640 x 480 if more people join. 

So I'm a bit confused with this contradicting information. Help! 

If I can get 720p, why don't I have it?

If I can't, is there a plan/setting that would allow me to have it for a one on one video call?

Thanks for reading! I'll appreciate any information you can provide, even if it's just your experience.

I'm asking about this from update 5/24-25/2021

"Persistent Notification Banners until Dismissed - AlwaysShowIMNotificationBanner
Disabled by default, this option will force on the “Show notification banner on screen until dismissed” setting within the Chat settings of the client"

I had an idea about what this is but might be wrong.  I cannot find anything in the support section that explains what it is or how to use it.  Has anyone had experience with it?

Thank you