Why am I being charged for Prime Video if I have Amazon Prime?

Hello there, I'm a bit confused about something regarding my Amazon Prime subscription. I have an active Amazon Prime membership, which I believe includes access to Prime Video. However, I've noticed that I'm being charged separately for Prime Video on my billing statement. Could you help me understand why this is happening? Is there something I'm missing or need to do to ensure that I'm not being charged twice for the same service? I appreciate your help in clarifying this matter.