This is also my conclusion after doing the same investigation. The sound is also key. It was definitely under power when it struck and it sounds exactly like a cruise missile. The engine pitch is quite low whereas a jet of that size at that speed would be a much higher pitch. If it were an aircraft operating under power, footage would show it's strobe lights and navigation lights regardless of it's speed, of which we see none in any footage. Conclusion is that it is a cruise missile of some sort. Cleanup team would've scoured the evidence for traces and replace them with aircraft parts. Sophisticated operation to say the least.