OK this happen to me after I install cm12.1 rc6 and google app. I had a cm12.1 for 6 month and I didn't notice the YouTube comment had a error after I install the cm12.1 . If you guy try to tell me how to fix it or give me a installer then I be happy too. I never brick my phone or anything cause i'm not a Noob since I done the rooting and ROM customize like 6 time and I really like the cm. Well I wonder how to fix the YouTube crash when you try to comment then it crash.