UPDATE: Videos got taken down by Wargaming. Linked reuploads instead.
You might remember Excalibur, we had a post with its logo 2 years ago. WG Seattle was making this until it was shut down and the project was transferred to Minsk for finishing. Looks like AW with Heliborne to me. However, it might kill Armored Warfare.
Unfortunately, the original videos were removed from YouTube by WG.