NEW PROBLEM: Blurry Video File

New problem: I post some of my zoom meetings on YouTube. I've been doing this for years with no problem. Yesterday, the ZOOM video file was blurry. Yes, I troubleshooted my camera and YouTube. It is the Zoom file. Zoom used to have an HD setting but I cannot locate it to see if it was disabled. I have no idea what the problem is. I tried support several times and got sent around in circles in their chat app. Any ideas? I'm desperate thank you.