thanks for checking the graphs! I also think that the drive should be ok because there are no typical errors in the SMART logs.
And I also think that this spin up value is not significant.
Some days ago I had a problem with my USB GPS receiver (Holux) and was searching for the error.
The problem was a defect in the USB cable connector. Now I've soldered the GPS receiver directly to the USB extension cable.
As a side effect I had no more skipping videoclips in the last days
On the one hand I think that the problem was caused by this USB connector so that the videoclips started skipping everytime the receiver was connected/disconnected/ due to this connector defect...
On the other hand it's unbelievable that such a minor defect could cause such problems
However, I hope that the problem is solved