Personally, I have created +140 videos and shown myself in all of them. The most time-consuming and costly part is showing myself as this requires a good camera, light, location, editing, etc. but I find this very rewarding as it keeps me in touch with my audience, keeps the video realistic, and improves a lot my personal brand.
I've learned how to edit video and audio on Adobe Premiere and Adobe Audition, and I use Camtasia for screen recording. The final result I get these days can be seen in my last video which includes an intro, a presentation, and a system demo.
I publish one video per week, and I've been committed to this for 4 years! I really enjoy this 😁