In a 1:1 format this would be effective in preventing some forms of misuse because it would be obvious if an individual took out their phone and pointed it towards the screen.
:-D
If you wanted video just have the device positioned outside the field of view. Laptop cameras fov is very narrow.
For every 100 people who might decide to take a screenshot during a teams meeting, I doubt there’s 1 person who has all that equipment set up and ready to go. You don’t need to make something 100% effective to get a benefit from doing so.