My game is too big, how to reduce its size?

I have a train ride video, I converted it to the GIF, then I saved every FPS as JPG, but when I use Animate to made this likes a train simulator, I found there was 185MB for each station, you guys know how to reduces it?
Comments
-Thomas
If you're using a recording of a train ride from MSTS though, I'd stop now as you probably won't have the right permission to use footage from that game in your own.
Hope that helps!
QS
Dr. Sam Beckett never returned home...
Twitter: https://twitter.com/Quantum_Sheep
Web: https://quantumsheep.itch.io
What now I guess your gonna say you need some of those images.
but as sheepy says you may as well delete anything you don't have rights to use from you project now.
Cheers
Hope that helps,
Thomas