Where are located innertube functions etc. #348

I want to implement innertube support to my local old youtube apps revival server that use local media as a database. I found that some of functions are located in back/yt2009m.js proto files are in /back/proto and idk what it really do yt2009pot.js when i'm openin app patched to my server its repeating /deviceregistration/v1/devices?key and app only showing loading circle. I would be grateful if someone help me cause Data Api v2 apps often don't work on modern devices.