Hello Matty,   I apologize, but I've watched your video and read your report several times and I'm not understanding the report my friend.  But I would like to comment of a few things in your narrative.   1, ActiveSky does not send nor does it calculate or determine aircraft speed information, so I'm not sure what you are seeing/reporting in this regard.   2. Looking at your video, I don't see any drop in the aircraft fuel levels, and I certainly don't see a 17,000k