Originally Posted by
Cloudtopper
I haven’t asked for your support.
However, you could perhaps analyse the correct graph.
The "graph" shows a 15-second gap between the aircraft still on the runway at 01:21:03, and in a gentle descent at 01:21:18 (at approx 50' AAL).
As for its vertical profile between those two points, your guess is as good as mine. Except that I'm not about to try.