I was using a Nikon D800 or D810, but I have converted to Fujifilm (having nothing to do with video recording) and now use my XH-1. In truth, any modern DSLR or Mirrorless will record excellent video. I think the choice really depends on what else you use the camera for.
I started using my Nokia Lumia 920, and recorded a course and a half with that phone.
Now I use a Nikon D3400, and have re-recorded most of the videos with it.
As Lawrence mentioned, I got the camera for my photographing activities, and as a bonus I get to record better videos for my courses.
We just moved to a Canon XA11 and LOVE it. We are now able to hook Jason's lapel mic (I believe he is using a Sennheiser MKE2-P-C Lav mic.) directly to the camera and no longer need to sync audio and video. Once we are done with the current course we are recording we will be working on better green screen lighting to get a cleaner key in post!
Panasonic GH5 (with Sennheiser MKE600 connected to a H4N) for me but mostly because I use it for my filming business as well. Love that camera!
I used to use the Logitech c690 webcam but a coiple of years ago I used some of my Udemy income to purchase a Nikon D5600. I really like the screen that can be rotated out so that I see myself as I film. It's a brilliant camera and I have never looked back.
Unfortuantely, I am now addicted to buying more and more kit for it.
"Which lights did you purchase?"
Hi. The lights we bought are, Yonguo YN 300 Air. We know very little about lights so please don't take this as a recommendation.
We tried them out yesterday and they are an improvement on what we had before. I wouldn't say that the difference is night and day, but we're happy with the result.