I did some basic image analysis of the twitter video. I took an image of the plane from the first frame and then 2 seconds later. I used the vertical rebar coming out the the concrete pillars to superimpose the 1st frame on the 2 seconds frame. As the camera was in motion, the alignment is very close but not exact.
Then I measured the length of the fuselage and marked off that distance increments to the later frame image. I did not account for the later image being closer and that will skew things a very small amount.
As noted on my image, I calculated that the speed of the plane was around 92 knots, ground speed. I'm guessing a bank angle of less than 20 degrees and that would change the stall speed by only a few percent.
I encourage others who can enhance the images to get better results.
Images from Twitter video