Many people do not know that every Mac computer has pre-installed screen video capture utility. All you need to do is start QuickTime Player, go to File->New Screen Recording and start recording video.
Thanks for this post, Sergey! I was one of the many who didn't know this, I will be glad to share this. I even downloaded a few "free" screen recorders that just asked for money / were stealth freemium, and I held off paying for anything because I just...knew it was free! Much appreciated.
ps - lovely bike ride yesterday, let's stay in touch!