What a little sweetie he is! I think he crossed your path because he somehow knew you have a heart for animals.
As kt_luvs_kitties mentioned, I would worry about people with bad intentions regarding black cats this time of year.
Do you think any of your friends or family might have a space for him? If they saw that video, maybe they wouldn't be able to resist him!
Thank you for letting him in and giving him some food. Please keep us updated.