Yes, though the video close ups were getting out of focus, I believe I could see the remains of a "void" in the metal.
So my thoughts are that the OP was fortunate(?) enough to get a rare metal defect, & in the smallest part of the clip. Along w/ that, the clip somehow got skewed to one side in an unusual/incorrect position, putting the webbing were it didn't need to be & better yet, right over that rare void in the metal
What are the odds on that
Well, that's my expert opinion... OK, no expert, that's just my regular opinion