did you realize that your latest video perpetuates a myth? The thing is, that's not how wings work. They don't generate lift because air moves faster on top in order to keep up with the air on the bottom.
It's a commonly-repeated myth. But it's scientifically illiterate -- a moment's thought should tell you it makes no sense! How does the air on top "know" it has to go faster to meet the air on the bottom?
In the main, wings actually work by the moving air translating a moment underneath the wing. For that to happen, you have to rotate the wing so it presents its underside to the oncoming air. (There is also a pressure effect due to differing air velocities -- but it's not caused by air molecules trying to catch up with their friends.)
That's why you rotate at Vr to take off -- otherwise, you'll drive off the end of the runway. And that's why your pilots trim for a slightly nose-high cruise.
For more info, see Cambridge University's explanation: cam.ac.uk/research/news/how-wings-really-work