Something came up, and I was not able to create a video. I have found, however, some Khan Academy videos that are very helpful. I like how he explains it; it is similar to what I would have said. Please study these and the textbook chapter. You should be able to do things like explain PCR, cloning/restriction enzymes, gene sequencing, blotting types, and the different types of vectors.
Khan Academy video 1, video 2, video 3, and video 4.