profile video introduction question

[7ca659bb]

Hello,  what are the size, length, and or other guidelines/restrictions for Profile introduction video ( not the terms of service, I think I understand that part) I am trying to save some steps and or redos, as in the portfolio I could not find restrictions until I ran into them. as in how many photos in a case study,if you go over a certain number it will not preview and publish. And I could not find how many case studys you could have until it would not let me add anymore.            Thanks