Uploading an interactive HTML5 video file



How do I upload an interactive HTML5 video to ATOM?

In the preview browser it converts it to an mp4 file which means the interactivity is lost


Atom is not a server and you do not upload anything to it. Just include your video in your page like normal, and any browser that supports HTML5 video will support it. Maybe the preview package you are using (which you have not identified) is designed in a particular way regarding loading HTML5 video, because Atom should support it just fine.

When asking for help with a package it is essential to inform people about which package you mean. There are multiple preview packages, and even if there weren’t, it would be unreasonable to expect people to try to figure out which package you mean based on a vague description.