Video format not supported.

I am new to H5P. Having installed the Wordpress plugin i have hit a frustrating problem early on. Can you guess what it is?

Any mp4 or webm that i upload gives me the error (read slap in the face) as soon as i try to either view it or add interactivity to it. Where do i find any information about supported file types that actually work?

What is meant by video format? encapsulation or codec? pixels or aspect ratio? file size? these are terms i understand.

Can somebody please clarify "Video format not supported."

Video format not supported.
Content types: 

I have the same problem, can anybody help?

Ok i found out what some of the problem was. My PHP upload limit was too low at 2mb. I'm using the Wordpress plugin and i was uploading to my webspace in this case. Some of my videos (made with handbrake) were incompatible but i haven't got to the bottom of that yet.

I am able to make interactive videos with H5P now though for the time being i'm restricted to 2mb. Maybe that's a good limit though :)

I hope this helps and treat the above post as an honest recording of my frustration for which i apologise.