Catalina downloading .mov with Alpha channel

I have just been figuring out how to use files with alpha channel with lumafusion on my iPad.
I understand that the .mov files need to be updated by the author to work in Mac OS Catalina. Is there anyway to filter search results for files that will work in Catalina, or know from the file description before downloading. I have been wasting a lot of time downloading files since I can’t find a way to know if they have been updated or not until after I download it and try to open it.

So far about 80% of what I downloaded does not work and about 20% works.

Thanks for your help…