I had the same problem.
In the videos it looks out so easyly, but it wasn´t.
Never pull to strong on the cable.
In front of the clip you can bend carefully the parts with the cut out sqares. First one side, then the other side! Now get one fingernail under the clip and pull up, while bending the sqare-parts to the front.
And then you need to be patient. Good luck
Sorry for my bad english!
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