Video format not supported
I'm using H5P WordPress plugin 1.13.1. I created Interactive Content and tried to add direct links to videos hosted on Amazon S3, using MP4, WebM, and MKV, neither work. I verified that the video links are directly accessible to the browser (used the link directly in incognito), tested on Mac's Safari and Chrome, iPhone's Safari. All produce the same result. Only YouTube links are working
What should I do?