Introducing Office 365 Video
http://blogs.office.com/2014/11/18/introducing-office-365-video/
Video formats that work in Office 365 Video
https://support.office.com/en-us/article/Video-formats-that-work-in-Office-365-Video-dd1af01c-fd8e-4640-b17b-93ee02b9b817?ui=en-US&rs=en-US&ad=US