Lenovo sells tablets outside China, so yes you can get a version that works with YouTube and PlayStore, as Lenovo products in my country do have PlayStore and YouTube.
However, I do not know how to flash Lenovo. I am not sure if Odin works for Lenovo phones, and I do not know a trustworthy source for their ROMs. I also do not know if they will be cross compatible since China uses CDMA, while other countries Lenovo sells to uses GSM.