N8.2 Mac Video Engine faulty?

we experienced strange behavior after installing the N8.2 Update on two of our Macs.
One is set up with Mac OSX Yosemity and one with OSX Sierra.

First Yosemite:
No Video could be played anymore. The Codec could not be loaded. ProRes, H264, DVCPro…

Second Sierra:
Some codecs could not be played anymore, i.e. DVCPro.

Anyone experiencing simmilar behaviour?

On a windows 10 machine it works fine.

really?? no one had similar experiences?