When uploading an .mp4 to make it an emote everything goes well until you see the emote after it finishes processing, the result is an animation that gets stuck on the first frame for a long period of time before continuing to do the proper animation.
On the picture you can see how the first frame shows up for a full second (values are 1 = 1/100 of a second) and the rest are significantly shorter.
It has happened with 2 emotes so far that I have uploaded in the past month and before that I have uploaded +40 emotes in .mp4 format and they all have processed perfectly.
