Originally Posted by
cyccommute
It looks to me like there is a tight link one or two links after the quick link. The "jump" you feel is just the chain remeshing with the cogs. Try pedaling backwards and watch for the derailer to jump in much the same way as the tight link goes through the jockey pulleys.
I don't think there is anything wrong with your derailer adjustment.
I checked the links, there are no stiff ones... Also, when pedaling with my feet(not hands, as in the video) the slips occurs continuously, maybe 3-4 times per 360° pedal movement. When pedaling backwards no issue is to be seen.
Originally Posted by
AnkleWork
Sudden symptom; look for a sudden cause. Bent hanger, bent der, hub bearing failure, loose locknut, an obstruction inside the dropout, etc, who knows. Pull the wheel and touch, feel, listen, look, disassemble, find something obvious.
Today I'll do a complete clean of the area, and also take the cassette and 10th cog out for inspection.