Am I mistaken that the ball appears to strike the bar, not only once, but twice, in the video clip on twitter? It was a cracking shot and was really travelling when it hit the bar and came down to earth. It is impossible to tell from the clip whether the ball was completely over the line or not from the video footage. It all happened too quickly. The still picture is a screenshot taken from a video clip (possibly the same one on Twitter) and it shows signs of the distortion that often occurs when an attempt is made to 'freeze' the moment. I strongly contest that the still image is completely unreliable.
Returning to the video image, I personally find this to be the more accurate evidence, and I am sure that the ball struck the underside edge of the bar and crashed to the ground before rebounding upwards again hitting the outside edge of the bar and projecting outwards for Ollie to make a comfortable catch.
As for the net rippling, I agree that there was movement of the net, but this is not to be unexpected when the woodwork is struck so heavily that the goalposts judder causing the movement of the nets that was observed.
I am not convinced it was a goal. I find it difficult to imagine the ball bending outwards from the perpendicular to hit the bar a second time if it had crossed the line.