[achow]

Use Teams for Video conference. It is a life saver.

Never faced issues on the things that you mention - screen sharing, uploading of a video or image etc.

Perf no issues, conduct internal as well as external conferences with college hires and interns (session attendance can go up to 70-80 people).

Yes there are some usability issues - the most notorious among my colleagues being the very clumsy meeting link share.