It depends on the clip, but in most cases I'm shooting with my iPhone. A good quality Iphone with a mic can shoot as well as a lot of cameras. A lot of clip makers will have a dedicated shoot phone.
Ideally I'm shooting with either 2 phones or cameras so I can get multi-angle + back up audio. One will have a shotgun mic, and a phone cage, the other is just back up. If i have a camera person I've started using a cheap gimbal to help keep the camera work smooth. I also own a go-pro for underwater content.
I use the filmic pro app just because it makes shooting easier - and also file transfer from iphone to pc. It has a built in slate which is a life saver. I edit in Adobe pro Premiere and use BeautyBox plug in for skinfilters. For some projects I'll edit in Inshot on my phone. I also use an app called PrettyUp for very quick videos (mostly for fansites) and it does skin smoothing stuff on my phone. I also use Canva to make all my thumbnails.
I currently make clips full time, and primarily only customs and I don't cam, so this setup has slowly evolved for me. If you have a decent phone, a tripod and good lighting you can make clips without all the extras. And if you're making clips for fansites I'd say the quality can be even lower..tbh. A lot of amateur looking content has its own appeal. There are also video editors and assistants you can pay to help you polish up your content if you're not up to editing it yourself or don't want the hassle, I use a guy who does most of my previews, some full edits and posts to all my clip sites for me so I have more time.
Sorry that was a lot of info and way off topic, im currently procrastinating editing a video lol!