<video width="320" height="240" controls>
<source src="movie.mp4" type="video/mp4">
<source src="movie.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>
The only thing that didn’t work was that it would work with the full path to the file. Then it would be possible to embed the video without syncing with ankiweb.
Just don’t use videos from [sound:…] as a source.
https://docs.ankiweb.net/templates/fields.html#field-references
It is convenient to have a separate field for the name of the video file.