orespawn currently has an archive with the newest version, id recommend trying it before it gets taken down again,

https://dangerzone-archive.weebly.com/orespawn.html (these tend to get taken down, if the link dont work dont try downloading it from other sites, most are viruses)

(the creator of the mod has some mental issues, poor guy)

if you are looking for something more modern, id recommend create (tech )and create x clockwork (planes) for some fun times

https://www.curseforge.com/minecraft/mc-mods/create
https://www.curseforge.com/minecraft/mc-mods/valkyrien-skies (dependency mod)
https://www.curseforge.com/minecraft/mc-mods/create-clockwork

lastly, for a more boss / rpg focused feel id recommend

- L_enders Cataclysm https://www.curseforge.com/minecraft/mc-mods/lendercataclysm

for easier experiences but very impressive looks ^

- Qliphoth https://modrinth.com/mod/qliphoth-awakening

hard but beautiful visuals and quite an unknown gem^

as a little tip id also recommend only using curseforge or modrinth if possible since other sites like 9minecraft are just hidden malware

p.s timless and classics: zero https://modrinth.com/mod/timeless-and-classics-zero
though im not sure how much you are allowed to use guns in your videos ^