The class is going through transition. The course seems like it was just put in the lap of a brand new professor to teach using old professor's materials. The old videos are awful and confusing but the new professor wasn't linent with the grades still. The intro video new professor made was fire but steep downhill from there.
Tip: READ everything on the page and all the million announcements the professor sends. Submit things on time because there is no grace. you will get zero if you submit late.