Lectures should be recorded by the most charismatic person that is sufficiently knowledgable about the subject and available on demand, rather than the archaic bored professor talking to a hall of 150 students, 5 of which are massively engaged, the rest are either going too quickly, too slowly, hungover, or distracted by something else.
I've always thought a little history makes the lecture more interesting. Yet dry and boring lectures seem to be the norm.