Three weeks ago, the October update
arrived for Xbox One owners. The update added the new avatars, Xbox Skill for Cortana and Alexa, Dolby Vision video streaming, and new narrator languages. However, Microsoft also wanted to make changes to the GameDVR storage policies at the end of the month, and those changes have arrived this week.
Players now have double the amount of storage space they used to have for Xbox Live Captures. So that players use this space efficiently, Microsoft will now be automatically deleting existing video clips over 90 days old that have no views. Any new clips recorded from this point onwards will be deleted after 30 days if they haven't got any views. Players can still back up their clips to a virtual drive or external storage before that expiration period, and if you're unsure on how to do this, Microsoft has provided instructions here
These changes are available now, so make sure you start backing up your favourite clips now if you want to make sure you have them forever.