Why Can't I Post MP4 in other places like Hyun's Dojo and Reddit?

Please complete the following questions!

Has this feature been suggested before?
No.

Is your feature request related to a problem? Please describe.
Well sort of. I can’t upload MP4 videos from Wick Editor to Reddit and Hyun’s Dojo.

Describe the solution you’d like
Allow the Wick Editor to post MP4 in reddit and Hyun’s Dojo please.

Describe alternatives you’ve considered
I have tried to export things as gifs, but it didn’t work since some of my animations need clips.