Do you have to show a timer on the screen during the run or can you just time the video afterwards and enter your time when you submit the run?

you dont need to show a timer on screen 👍

what if you can't video

You can film with your phone if you want

@XD_FISHY You need a video. If you don't have stuff like OBS, you can definitely use your phone. But you cannot even submit a run, let alone get it verified, without a video link.