When adding a video via the Moodle Media option to a Wiki in Internet Explorer(version 11.162.10586.0) and Edge (25.10586.0.0) the video will not embed and does not display in the Moodle media player.

Steps to replicate

1. Create a Wiki on a 3.0.3 site
2. Create a wiki page in HTML format
3. Use the 'Insert Moodle Media' option in the editor to upload the video file (Im using a webm video)
4. Insert the video
5. Save the Wiki page
6. View page in Internet Explorer
7. View page in Chrome
8. View page in Edge

The expected result is for the video to display in the player, however the actual result in the case of Internet explorer is the videos display as a link that when clicked prompts a download of the video. In the case of Edge the videos display in a non interactive black window with the text 'Invalid source'. The video displays correctly in Chrome.