You should check out Loom. It is an extension that you can just install to your browser. One of the things I like about it (besides being free) is the fact that the recording time is unlimited. At least it was last I knew. Other programs like camtasia/snagit limit you to like five or ten minutes. It is annoying. Another one I just heard about is called Tango. You might want to check that one out too. Or just keep using OBS, it's definitely a powerful program.