Localisation issues

Hi, I am trying to upload individual language videos into each language section of my courses, but every time I do, it changes the video for ALL language sections. Eg. If I upload a French video to the French video of the course, ALL other language sections also change. 

The issue is now also impacting embedding videos and ANY content changes I make to an individual language. 

This seems to be a recent issue - is anyone struggling? It renders the function pretty pointless if this is a new change to the localization/localisation feature.