There's 3speak shorts already. You can upload short videos up to 90 seconds. I'm unsure if it works fine in 3speak.tv but I'm using the 3speak app to upload.
It's not yet the best UI/UX experience there is, but it's okay, it can be improved later on. If you view it in different frontends though like peakd or ecency, it shows like normal long video.
Hope this helps!

And BTW, your image link is broken. LOL