There's a small crack on my phone htc one m8. Then it was raining and my phone is in side my bag and gets little wet. When I turn on my phone, the part near the crack screen covered in blue there's some black spot on it. should I put my phone in uncooked rice or should I change the screen(+ LCD)?
Yes, you should if you still want to enjoy watching videos. Which HTC phone are you using? Contact HTC to know how much it would cost to repair your phone.