Particle Effects look different and movies aren't playing in a packaged game

I’m trying to package a project in UE4, and it mostly works fine after being packaged, however there are 2 problems: the particle effects I’ve made appear differently in the packaged result compared to the editor, and the movies that are packaged aren’t playing.

For example, this sword trail effect is a completely different color after being packaged, and the yellow blade doesn’t show up.

Screenshot 2023-04-30 191246

Screenshot 2023-04-30 192657

In other instances, the trails are the correct color, but they do not glow at all.

Screenshot 2023-04-30 193015

As for the movies, the only thing that shows up when they’re meant to play is a blank white screen. Any ideas on why all of this is happening?