Specific directions will depend on the specific iPadOS version your iPad is running, but basically (on iPadOS 18), the Camera and Microphone access settings are found by going to the Settings App (gray cog wheel icon) ➜ Scrolling down to Apps ➜ Scrolling down to Safari ➜ Scrolling down to Settings for Websites and tap on Camera or Microphone and you can set the global setting to Ask, deny or Allow.
You can also set these individually for specific websites, by opening the website in Safari, tapping on the Website Settings icon in the search bar, then on the 3 dots button [...]. ands scrolling down to the "Website Settings for (name of website)" section.
Some websites may not show this section if they don't have any requirements for extra permissions.
Can't find a specific video that addresses this though.