Another thing I thought of:
A user readable log of completed downloads.
When the movies/shows/videos have downloaded successfully, they are shown on the "Downloaded" tab. If you clear that tab, you don't see your past downloads. So besides just displaying that, write it to a user friendly/readable text file which continues to grow over time, so that we can reference later, look up what we have downloaded in the past, from where, etc.
If possible this log should contain at least what is displayed on the Downloaded tab, and potentially also include the following (off the top of my head, and not listed in a specific order)
1. Title
2. Service it was downloaded from
3. Video Codec
4. Audio Codec
5. date downloaded
6. destination File Name
7. Video bitrate
8. Audio bitrate
9. Release year if provided in meta data from streaming service