Your boss makes you film videos for promotional purposes but you’re not comfortable doing that but he also pays you good money. What do you do?

The whole idea makes me cringe and it’s not on my list of responsibilities nor do I work in sales/marketing but he kinda insists. That being said, I’m happy with the remuneration which is why I always do what is expected of me but I also get anxious just by thinking about it. Thoughts?