When it comes to accessibility, captioning is by far one of the best ways to make a flipped classroom an accessible classroom to many learners. Microsoft Movie Maker has the capability of placing captions over video clips to help the visual learner. I have located a tutorial on Microsoft's website that explains the process of using Movie Maker's title/ credit component. You merely place the credit over the video. You can see the tutorial here.
I have used Movie Maker often for putting together tutorials for students and staff. It is an easy program to use and the fact that it is free makes it even better. It is available on every PC computer and if it doesn't appear, it can be downloaded to your Windows PC. It isn't compatible with an IOs system.
There are several good tutorials for Movie Maker in general on YouTube as well. It's worth looking into.