How do I put a video in a DRFX package?

I've been trying to make a DRFX template (just a simple paper unfold animation using a greenscreen that has like 27 frames max) that my colleagues can just swap it out for any other file, so far so good, pictures can just be a Loader node and it works fine, but for the actual video file in the transition, how can I ensure it stays in the DRFX package?

Turning it into an image sequence and putting it in the Loader node works fine until I convert to DRFX, I put "setting:\filename1.png" and the loader just reports back missing frames.

Here's the node tree with the 2 loaders, \"Placeholder\" works fine and is properly called back, \"out#.png\" is the big problem

Been cracking my head at this for a good day already and have 0 idea on what it could be or if there's any alternatives

I'm using Resolve 20 in a M4 Macbook 16GB RAM