This problem was occuring with my old chain, it was worn so I've replaced it, the chain in this video is brand new, it has not had a ride out yet. As you can see the chain is slipping on the front chainring. I've done everything I can think of to adjust the drive train. This only happens on the 53x12 and 53x13 rear sprockets. I've been playing with the limit screws on the front and rear, re-indexed everything I can, but can't "stumble" onto a fix.
I'm at the end of any technical knowledge I possess. I'm wondering if this is a "wear" problem on the front chainrings. Its a Shimano Dura Ace FC-7800 175mm. Does this need replacing? Or is there a simpler explanation that I can try to fix?