AhsanAllahu ileikum, I have constant thoughts that I am not a muslim. If i watch someone on YT and he says blasphemy, is me watching other videos of him make me kafir? JazakAllah khayr

Ustadh AbdulAziz al-Haqqan

No. Take it as a golden rule, the answer to all of your questions is: yes you are a Muslim, no you are not a disbeliever.