Hello paulvincent(2),my name is Luiz Cruz independent consultant and I'm here to help you;
I understand that sound and video stutter when you move your mouse;
Does this problem only occur when you move the mouse cursor?
What exactly is the model and manufacturer of your mouse?
What exactly is your PC model and manufacturer?
If it's a desktop, what exactly is the model and manufacturer of the motherboard?
Before answering the question, I suggest that you check if the system is up to date;
Press Windows key + i and go to Update and Security;
Click Check for updates and do ALL pending updates;
Make sure Edge is up to date;
Open Edge and go to Settings;
Click on About Microsoft Edge in the menu on the left of the screen;
If there is an update, it will be done;
Try resetting the Edge settings;
Open Edge and go to Settings;
Click on Reset settings in the menu on the left of the screen;
Click on Restore settings to their default values;
Click Reset;
Check if the problem still persists;
See you soon!