Best indoor exercise bike?

[Phaskell]

Hi guys,
i'm thinking to getting some sort of cardio equipment that I can use it while watching educational videos on my computer, I think of indoor bike could also really help me boost my caloric requirements.
I have never used cardio equipment in my gym, so I do not know what is the difference between standard cardio, elliptical and exercise bikes that look like this:
https://fitnessgeko.com/fitness/body...n-bike-review/
any suggestions.