Microsoft has just updated native Music and Movies & TV app for Windows 10 Mobile to version 3.6.1154. With the update Music is re-branded to Groove Music but Movies & TV is Film & TV on phones , it seems
Talking about the changes the update brings you can click to read more here. Though Groove Music has the ability to hide filters and sorts while browsing your music as the most visible change apart from the re-branding. OneDrive app has also snagged an update but without any changelog, it is hard to tell what actually has changed.