Mk_1_Livery_Pack.zip is a release file of the Minecraft resource pack BR Mk 1 Livery Pack - IR, made for Minecraft 1.14.4, 1.10, 1.7.10, 1.12.2. It was published on January 25, 2020 and is 30.5 MB in size. For the full description, screenshots and every other version, visit the BR Mk 1 Livery Pack - IR resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.