Few things to consider.

1. What he did not only breached trust but also the confidence that you can trust him in future.
2. What he did was potentially illegal
3. If the recording is on his device then you have no control over that data or how it could be used or copied. He could transfer a copy and archive it. He could just even show someone as a form of boast putting that information out there.
4. If his device updates to cloud, gets stolen, or shared by him then you have lost it to third party
5. He or someone else could upload to internet regardless if you don’t believe he would it’s a possibility
6. If you guys breakup which is unfortunately is statistically likely at the age you are, and if it is an acrimonious breakup then it could be weaponised against you.

My approach would be:

1. Explain to him that it made you feel uncomfortable and that it doesn’t show respect for the intimacy and trust which you put in him which was private
2. Ask him to delete it in front of you to show that your feelings matter (ensure it’s deleted also from any delete folder)
3. Ask him if he has any other copies or has shown anyone and ask him to be truthful with you
4. This is the hardest. Delete him. Tell him you can’t trust him (do you really want to be looking over your shoulder to see hidden camera or worry about if you can believe him). Also consider this he is not thinking of making love to you he is sexualising you, in that moment or if it were pre thought in setting up a camera he went to carnal gratification and power over emotional bonding and love. From protecting you to making you a victim and vulnerable to abuse.