I didn't include capitalism because the point of the video is to teach people the difference between words many use interchangeably (socialism, communism, and fascism). It's meant to be helpful to people with very limited understanding of concepts like these. It's not meant for those, apparently like you, who already have depth of knowledge on them. It was also assignment for an education course to make an instructional video for high school students that was limited to 5 minutes. I was unable to pack all of the nuances into such an amount of time. But if you feel it's insufficient, I invite you to access the multitude of sources on the internet that will have further information for you.