Answer:
Explanation: Open your Zoom recording in the video editing app of your choice. Trim out the black frames of the video. Save/export your video. Open Zoom again. Click the gear-shaped Settings icon. Go to Virtual background > “+” > Add video.
Answer:
the answer is that it's the easiest to recognise and create
They add a personality and stop sometimes
Answer:
I don't know, but maybe because they possibly aren't allowed on other apps, or they are banned.
Explanation: