HDR Videos are supported in our Android app. The only caveat is that the video will appear "washed out" when adding them as a snippet in 1SE.
You'll have to turn off HDR mode in your camera settings to avoid having washed out & dull looking snippets. Otherwise, you'll have to re-export and edit the HDR video on another video editing tool to fix the color before adding them as a snippet.
Restoring HDR clips from a newer iOS device to an Android or older iOS device
When trying to restore your HDR content from a backup into an Android device or an iOS device that doesn't support HDR video, you will receive a warning. If you decide to continue, your snippets will be restored, but they will lose their HDR qualities.