Feature: Add timestamp to video

[mjcc30]

Hello, nice work!
I don't know if it's possible to add timestamps from users that can be shared with others.
like
http://localhost:5173/mycourse/introduction&t=165s

And another cool feature is to add a progression bar for videos, and when you quit, you can replay the video at the timestamp you stopped it before.
So you don't loose time or need to remember when you stop the video the last time.