Three different things people call a download
A poster image, a list backup and an offline video are not interchangeable. A poster helps identify a movie. Your Cinebloom backup holds saved title identifiers and episode notes. An offline video, if offered, comes from the viewing service and follows its device and access conditions.
Prepare for a journey
Choose the film while you still have a reliable connection. Open its viewing option and check whether that service allows a download on the device you will take. Confirm the edition, language tracks, available storage and expiry information. Do a short playback check inside that service before depending on the download away from home.
Downloading a season
Count the episodes you actually need. A series page may describe several seasons while the service offers only some of them. Check season numbers before starting several downloads, especially if you are continuing midway through a show. Your manual checkpoint can remind you which episode you finished; it does not transfer the episodes themselves.
If you only want to remember the film
Use Save to My List. That is enough to keep the title available for another visit and avoids confusing a recommendation with an offline copy. Return through My List when you are ready to choose a viewing option.