Adding file to each photo

I wish there was a way to add a ton of files and add each photo to each files example List - Disney animated canon uk - TheTVDB.com

as soon as you have the files in your file system with a somewhat decent name pattern that can be used for automated name generation, you can embed the files.
If the pictures are stillin the cloud, then you either have to treat each album with one of the cover web source scripts or use a third party program like albumartdownloader.

does this work for movie posters

I cannot say a lot about features of third party products.
It looks for picture files that correspond to search criteria ... so it could be.
You would have to try it.

Thanks I’ll give it a go later