Yup exactly what i didJust to make sure I understood what you said, you compressed an original game vpk of Shovel Knight (without anything removed) into a zip to reduce its size, renamed it as a vpk, then renamed it as a mp4, transferred it over and renamed it back to vpk, and successfully installed it? That sounds like a niffy trick to reduce file size, thanks for sharing it! Most of the games I have been wanting to transfer are 2-3gb giants sadly :/
It worked perfectly
Btw: Havnt really tried this with bigger files since i got henkaku yesterday but it could work, so fingers crossed