Im not sure of any other way to keep the original date of posting. Your content is displayed in a bunch of different ways because this is nostr! Each app will display your content however their UX allows. Thats the besuty of it. That being said.. I do wish there was a working Instagram style...

You should have used the propper event-kind to begin with. You posted your videos on what is effectively nostr's version of a post-it note; instead of what would be analogous to a film roll or however you want to put it. This means it will always be messy, no structure, nothing, and it will by burr...

Nostr is the way ⚡️