From the Tumbler page of the G5 wiki account:

"The video showcases her work on TYT and includes clips from future episodes, some of which are from what our source claims to be the second special. Spoilers ahead.

The clips shown are unfinished, with lack of backgrounds, sound effects, and polished animation. The first half of the video includes scenes we've previously seen before.

It looks like we may be getting more Allura content, and according to our source, the clips at the end with Pipp are supposedly from the second special. A bit of what sounds to be a demo of an unreleased song is also featured in them.

Aside from the new clips, we now have confirmation that TYT was animated on Toon Boom Harmony!"