У вашего броузера проблема в совместимости с HTML5
How to install Python 2 and Python 3 in Windows 10, and how to write Python programs in Atom and run them at the PowerShell command line.
This educational video was created for use in LaunchCode's in-person training programs. LaunchCode is unable to respond to comments on these videos or support learners outside of these programs.
To learn more about LaunchCode education programs and find out if there are any in your area, visit https://www.launchcode.org/get-started