There's no elevation problem at Zurich, and I can't see anything similar to your video in the scenery, it can only be caused by another scenery in conflict which sets a slightly different altitude, most likely an AFCAD from another product.
You can search for conflicting AFCADs in FS9 using the free ScanADF program.
If that program doesn't find any duplicates, it doesn't mean there aren't any, just the offending file is not an AFCAD, so you must search for it manually.