FYI,
Here's a quick and easy way to check for an RI and also anemia with less stress on your snake.
Since a snakes glottis (end of the breathing tube) seen in pic 1 is located at the front of the mouth, fluid from the respiratory system will accumulate between the lips and the gums. By just pulling down the lip as seen in pic 2 you can check for an RI and anemia.
A Boas teeth are curved back and very thin. Easy to break. When you pry open their mouth you need to use something that won't snag on their teeth when you remove it.
Pic 1 is from Wikivet.
I commend you on doing educational videos. Take time to properly explain what the purpose is and research possible scenarios of what you are showing.