If you have a system with your user folders moved to another drive, vs does not find any videos in that folder.
In my case, i have a evo ssd as my main drive and a wd black2 hybrid drive to store media on. I have redirected the user folders to the secondary hdd. And when adding them either via the user folder selection or direct path, it will show the correct path, but will not find any videos. To bypass this i can still just make a movie folder that works with all the movies in the %user%/Videos folder, as long as it is not nested within the videos folder. Hope this helps some people, and hope it can be worked out. I have tried this with multiple win 10 machines, it happens every time.