Hi! Uploding video from Twitch clip doesn't seem to be working correctly.

Here is a link to the clip that I was trying to add:
https://clips.twitch.tv/UglyRudeCourgetteANELE-R-GEzEScCkBgeGi5

Using the link above gives out some weird buggy thing and submit is grayed out:
Screenshot

Only using the embed video link works for TMX and allows to proceed. It even grabs the thumbnail. But the video doesn't end up working on TMX after submitting. Below is the link to the video added using embed URL:
Embed URL provided by twitch clips:
https://clips.twitch.tv/embed?clip=UglyRudeCourgetteANELE-R-GEzEScCkBgeGi5&parent=www.example.com

Result:
https://trackmania.exchange/video/1960

Am I doing something wrong or is there actually somekind of a bug?

Thanks