Jet Engine Propulsion

I have a recurring question that floats around in my mind, that goes the following:

Ive heard from multiple sources that Jet engines use bypass air to generate most of the thrust, but how does air that is not manipulated in any way shape or form and just passes through the exterior of the engine generate thrust, while the air inside the engine that is mixed with fuel and ignited doesn’t produce much thrust.
If any of this information is wrong, please respond with a link of a video, article, etc. that I can site to see the proper process of the inner workings of an engine.
Thanks

This video breaks down the propulsion process starting with Newton’s Third Law of Motion and further in the video it goes into more details about different types of engines.

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Thanks you, I will make sure to check it out.

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