Unfortunately, no further details are provided with the video which just shows the wheels moving. No dyno figures yet but this is a complicated process and there is a reason nobody has brought a positive displacement M3 kit to market. It's very, very hard to do.
Pricing is expected to be in the $12,990 area with a release this Fall.
The main thing to take away is it's still coming and according Harrop relatively soon. BimmerBoost wishes them well and wants to make it clear when this comes to market it will be an achievement worthy of great respect. Good luck to all involved.