Professor solves and explains over 300 Computer Science Exam Problems in a row (youtu.be)

You (or someone else) seem to be submitting this, and then deleting earlier submissions. The guidelines[0] specifically ask you not to do this:

> Please don't delete and repost. Deletion is for things that shouldn't have been submitted in the first place.

Aside from that, you seem to submit these "Professor solves a million problems all at once" type links ... is there a reason for so many submissions?

[0] https://news.ycombinator.com/newsguidelines.html