This morning I was talking with two teachers and we were talking about ways to record lessons. One mentioned that PowerPoint has recording built in. The teachers were wondering aloud about what it might look like.
The recording of the lesson doesn't need to be everything you teach. In fact, I don't think it should be. It should just be the essential learning outcomes. (Which sounds strange when I read it back because learning outcomes are essential.)
For example:
Math
Is the lesson is Logarithm practice, maybe they need to know the laws and a few example problems.
Language
If you are having them write a response to an article, they might need a reminder about what the directions are, an idea for how to structure the writing, and an example is that is what you show the rest of the class.
An easy-ish way around not having PowerPoint (us) is to use Google Vids. (vids.google.com)