Uploading alpha channel videos?

Hi, is it allowed to upload videos that have alpha channel in a way that first part of final video is RGB and other part is luma matte, where user cut’s the video in half and uses 2nd part of video as luma matte. I saw it in some other stock sites and I think it’s good idea. Files with alpha channel are huge and when you upload 500+ files it takes forever, because often that’s close to a TB of upload. When you upload separate luma matte file, you have to zip it and make preview video, which is taking away time when you have a lot of items. So this idea is pretty good with 1 file containing rgb and luma matte in one.

So, once again, is this allowed? thanks in advance.
@MotionRevolver @MarkBrodhuber

anyone uploading like this from authors?