GO 3

I don’t think they’ve had one on them since the Go 3 at least. There’s usually a thread on one of the quick mounts.

The Insta360 Go3 is probably the best tiny small action camera you can get, there is also another similar camera from DJI but if you are in the US, there is no availability. There are tons of small action camera sold on Amazon, but video quality wise are quite worse than the GO3, the only positive is the low cost which won't be big deal if it gets lost.

You are sacrificing low light performance and some video quality with the Go. The sensor it's smaller on the Go, so that's the reason it loses against the Ace in those fields.

Insta360 Go3 S with a clip mount to your hat brim. Or you may also want to look into the new Oakley Vanguards which seems quite good for your use case (but Meta)

Go3 but I learn a lot/even more, sometimes, from my iPhone that someone is holding and recording me.

Yea, sadly, last camera closest to 180-degree concept was Go 3. Why can't they make just half of X5 in Go form-factor?

Go 4 ultra is vastly superior to the Go3s, I've got both along with 2 more of the original go 3

I shot adult semi professionally for years and now still shoot personal adult for fun.  If you're shooting handheld, you're going to run into tons of stability shake issues for anywhere you'd need the go3's size aside from public/voyeur style shoots where you really don't want to draw attention. But a phone would be just as good in most of those situations. And in the few the go might be more discreet its lighting and dynamic range are going to suck as much as the x3.  The x3 can be relatively just as discreet if you act cool and you (as you should) have subjects coordination and consent. Just did a fun upskirt walking with my partner last month with the x3 on a selfie poll (screen set to 5s off after recording) held down at my side with a swoop between the legs when the coast was clear.  People don't think of the 360 as capturing what it does and with auto screen off and screen facing out so it looks "off" with it between you and your partner so it wouldn't be capturing anyone else there's nothing that would flag concern in peoples minds. And you make sure that you're holding it against your leg with your partner on the other side and high enough so that it wouldn't capture anyone else inappropriately because the sight line would only capture someone walking directly next to you and coordinating their walking to capture the shot. Really for shooting indoors you're going to need to focus on lighting lighting lighting. Use directional but diffused lighting from multiple angles so it's not creating harsh spots unless you're doing an artistic style. Otherwise expect to be using lots of lighting/natural lighting. You'll basically have to learn the same skills as a small budget indie film/documentary but less on the artistic lighting side unless that's the style you find customers prefer (example is kink.com's brand enhancing scene lighting). Anyways that's not what I thought I'd be spending a long time commenting on in the insta360 sub so I'll wrap it up there but hopefully it helps.  And for insta360's product sake "although I wouldn't recommend the GO series for adult work I would highly recommend the X series 360 camera as a secondary camera for intro price range inventive and innovative consensual adult shooting. To bring new possibilities for all content consumers and creators of legal age in their respective countries "