I can very well see that you got really invested in this project! You have gone above and beyond of the general instructions given in the guided project and found many more insights. Usually most people, including myself, stop at finding the best time to get most comments. But you have dived deep and found so much more information.
Like artur.sannikov96 mentioned, your structure, use of markdown cells and explanation makes it a great project.
I also feel that you could have added a bit more code comments.
The project altogether looks great, though there are a few suggestions.
You could have added a line about the data set and a link to download it for anyone who is curious.
I can see an empty list
work_day = 
Have you also had an idea to segregate it by weekdays and finally dropped it?
You missed mentioning the time zone, which can make a difference to people who are not in EST. Your string formatting looks great, an extra piece of information in the form of time zone would have made it much better, in my view.
other category, I don’t have a lot to suggest. Looks like there can be different categories you can share, such as videos ( you can see the category within
[ ] in one of the 20 items). If you can find which are the different formats shared on the other category, that might be a good idea to explore.
Anyway, you have done a great job. Thank you for sharing this project. Happy learning.