a man describes how to use a program
a man describing the computer screen
a man is explaining how to do actions on a computer
a man is explaining something in mac os
a man is explaining the computer screen
a man is talking about a software program
a man playing a video game
a man speaking on applications for his computer
a man talks about a computer
a person is explaining how to use actions on the computer
a person is explaining something
a person records their desktop screen
person talking of apps
someone is explaining a computer program
someone is showing some application
someone is teaching how to use an application
someone talking about the keynote application
video instruction of keynote
a person is explaining how to use actions on the computer
someone talking about the keynote application