Higher framerate GIFs?

Exporting GIFs from Photoshop seems to be capped at some framrate as setting all the images to have no delay yields a slow playing GIF if the original video that the frames were taken out of was 60 fps. It seems that GIF can technically allow 50 & 100 FPS but I have no idea how to access it in Photoshop. GIFs do exist that have high framerates and they look great.
Example: https://gifer.com/en/5rix 

If you inspect this "gif" you will find that it is actually an mp4 

but when you download it, it is actually a GIF and it plays at a higher framerate 

Can someone please explain:
1) what is going on here?
2) Is this able to be replicated in Photoshop

Before someone asks why I want to use GIF rather then WEBM or some other file, keep in mind that as far as I know GIFs will autoplay in many programs (Discord for example).