I made video solutions to all the problems (A-F) of Round #628 which you can find in this playlist here or using the links below.

Problems A and B
Problem C
Problem D
Problem E
Problem F

As a side note, with all my extra time from staying home, I'm coaching people who spend 6-10+ hours a week coding with targeted problems to improve rating. If you are interested, fill out this form and I'll reach out.