Introductory Fluid Mechanics L3 p1: No-Slip / No-Temperature Jump Condition

[captainamericawhyso]

Great video, sir. Thank you so much. I have a question though.
When we talk about friction in the pipe walls, is this friction between the non moving fluid that has zero velocity (no slip condition) and the pipe walls or is it between the non moving fluid and the moving fluid atop of it ?

[kumareshjv]

In the video you shown the wall(wing) is moving than the velocity near the boundary of the wing should be same as the velocity of the moving wing. But in that case velocity near the wall is less?