Here is a link to an article from English Teaching Forum magazine on using Radio Drama. I have done multiple radio theatre projects with students, but have no videos of the process. You do need at the very least a recording device. In the old days I used a simple cassette recorder. Now I hook microphones to a mixing board with an interface to my computer. It can be as simple or as complicated as you want. This article can get you started.

https://americanenglish.state.gov/files/ae/resource_files/etf_56_2_pg16-25.pdf