How to organize the recording of a web page?

Question

Video broadcast

Hello.
There is a simple page with a built-in broadcast via Google Hangouts and a VKontakte comment block.
What methods / services / tools can be used to capture the entire page and then convert it to a video file? Camtasia and various screen capture programs are not suitable, it is necessary to implement automatic screen capture after the broadcast starts or a certain button is pressed, because such pages are created in bulk, broadcasts are set up at different times and this business needs to be automated.
PS I know that GetResponce gives the functionality of hosting webinars (with an adequate record of everything that happens on the page), but it is implemented in flash (as far as I know), which is not suitable for us.

Answer 1

Set up your OBSstudio or ffmpeg