This is a real classroom Calculus 1 lecture. In this lecture I covered section 3.1 which is Extrema on an Interval. We talked about critical numbers, the extreme value theorem, and various other things. Lots of examples were done. These lectures follow the book Calculus by Larson and Edwards. Here is the book https://amzn.to/472xvYc (affiliate link).
I hope this helps someone.