The term for a patent is 20 years, according to my limited understanding. That's an enormous amount of time to be able to legally have a monopoly on something l

The term for a patent is 20 years, according to my limited understanding. That's an enormous amount of time to be able to legally have a monopoly on something like 'playing video on the internet', 'in-app purchasing', etc. Do you think when a company owns a process like that, for 20 years, that it improves innovation?