[FNV] Anyone familiar with the mod Helmet Overlay and how .dds files work, is it possible to make an animated overlay?

I casually make HO patches from time to time and someone asked me to make an overlay for this mod. I successfully made an animated png sequence of the overlay, but have zero clue on how or if it's even possible to have it work in-game.

I tried asking the original dev of Helmet Overlay, but he's gone radio silent.

I did some digging and discovered that Fallout 4 used image sequences as dds files to animate some things, but I understand that Fo4's engine is probably pretty different from NV's.

So I've come here.