Begin with an Overview

What are you going to cover in this lecture?
What do you expect students to do during the lecture? Take notes, follow along in the chapter, fill in the worksheet?
Does this lecture prepare them for an assignment or exam in the course? Let them know this in advance.
How long with this lecture be or how much material are you covering? 2 chapters, Unit 3?
Will they have access to the slides outside of the lecture?

Incorporate Variety

Keep your lectures to less than 6 minutes. It's better to chunk large lectures in shorter segments than to post one large lecture.

Try to include images, colors, videos and animations when you can in your slides to keep students engaged.

Prompt students to pause the video and find the answer to a question and then walk them through the answer.

Let students know what they should do next after completing the lecture.