I have a bunch of family videos in on a shared Google drive and I am looking for a video player that can browse the folders and stream the videos on my AppleTV.
On my my Mac, iPad, & iPhone I am using nPlayer. It hasn’t been updated in a while but it works well. Unfortunately they don’t have an AppleTV version.
I have apps called FileBrowser (iOS) and File Explorer Pro (Apple TV). They are made by different companies but similar enough I had to verify they weren’t the same product. In iOS, I connect directly to Google Drive and OneDrive, but on the Apple TV I connect to the Mac host and can access the files from the system folders, to include the Google Drive sync folder, on the Mac. I have a 2010 iMac that serves as a file storage machine, so they are always available (as long as the iMac hasn’t turned off from a power outage or something). May not be the solution you’re looking for but it works well for our situation.
Plex could also do this and my non-techie wife has been very happy with it on our Apple TV.
Or has she just been happy because it has Doctor Who on it?