[whiteberry]

Some SD and HD movies that you’ve already bought or redeemed might be upgraded to 4K. To be updated to 4K, movies must be:

• Bought or redeemed from Google Play or YouTube.

• Only SD movies bought or redeemed before October 23, 2018 will be upgraded.

• From Fox, Lionsgate, NBC Universal, Sony (US only), or Warner Bros.

• Available in 4K, in your location.

https://support.google.com/googleplay/answer/7184994