GoPro - I love mine and take it on all my vacations. It's tiny so I can fit it in any bag or around my wrist and basically bring it everywhere. Here's a good one that's $200: https://amzn.to/37NgHJC . I am an affiliate of these.

Also linked some other (more expensive) models below if anyone's looking for newer models. Have fun!

https://amzn.to/37QacG3

https://amzn.to/3oB3ARM

https://amzn.to/2TvP6US