How can I send a video to you to show what's going on when I'm logging on Ubuntu 18.04?
I have a problem that involves a sequence of events and I need to show a video to explain the problem.
Use a video camera to record a video of the screen, upload it to your favourite file or video hosting service and add a link to it to your question.
Unfortunately there's no good way to record the screen content at this stage of display and session management. You may want to look into different means to convey to us what's happening and you're welcome to ask for one.