This will only fit about 3 people because of cloud variable length limits, but I can show how to expand it if that is wanted. Click flag to add your data. This saves users' viewing dates, times, and usernames when they click the flag, using cloud lists. It then uses the data to calculate dates and times. 577 blocks. Please click the flag, it would mean a lot to me to see multiple names on here. Feel free to use, but please tell me that you used it.
100% by me. Made in about 2 hours, using my cloud lists: https://scratch.mit.edu/projects/424026136/ and my list-variable: https://scratch.mit.edu/projects/393295591/