If you stumble over words or get facts wrong during a recorded television interview, you can recover. It's crucial that when you're in front of the camera you come across as credible and professional. And it's important that if you do make a factual mistake, it's corrected straight away. Now, you can always stop what you're saying and restart your message. Generally, the reporters won't mind it may be that the cameraman turns the camera off for a moment or so. While you gather your thoughts.
The important thing is that you get your story right