Google is removing select video file types from the free compressed video and image storage option within Google Photos.
It’s unclear what video files are unsupported, but Google will still offer free compressed backups for most major file types. It can be reasoned that the search giant has decided to stop supporting free backups for large file types like RAW videos or VOB.
Users can still backup these unsupported file types, but it will cost Google Drive space instead of being free.
Source: Google Support Via: Android Police