My mom bought the new cruella movie and she wants to watch it but doesn’t know how to find it. How do I find it so I can show her
Exactly what did she buy? If she bought the disc, you can't watch that on a Roku. If she bought it from an online streaming provider, such as Prime Video or Vudu, then you install that channel, log in with your user credentials, and it will be available under your media library.
Try Disney+.
There's only five channels you could have purchase from, its $29.99 on each. Four of them you can purchase, Disney+ you are paying for just access, your not renting or buying, where the other providers its straight purchase. No renting at this time.