It should survive a reboot. What it will not survive is a play store update. I have the LSPosed module blocking the YouTube update. You need install LSPosed and the update locker module. That will prevent the play store from updating the app.is this all the same for YouTube music? I haven't had any issues lately with YouTube itself but since getting a car I have become dependent on YouTube music.
for the record I followed the instructions got the latest yt music APK and used sai to install stock then manually copied the root APK over to replace the stock base APK and it's working for now. I imagine it doesn't survive a reboot without some special mounting script though am I right
Thread '[MOD][XPOSED][4.1+] Update Locker - stop update your apps' https://xdaforums.com/t/mod-xposed-4-1-update-locker-stop-update-your-apps.4433253/