Sit IN a chair or sit ON a chair?

In this video, I show the difference between sitting on a chair or sitting in a chair.
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[@marinacherkezishvili899]

Thanks a lot.

[@English_With_Vishnu]

I completely agree with you, mate.This is what the exact difference is, and that's how I teach the difference to my students. Some self-proclaimed English language experts here are using "in" both type of chair.

[@OneMinuteEnglish]

Thanks Vishnu