I’ve started to use the iPads in some Drama lessons when students are preparing their performances (and working towards a final piece). I ask the students to work in groups of four (two pairs together). One pair watches the other pair and gives constructive criticism, but also film the performance for the students. Then they swap. The students then have the opportunity to watch themselves back to see themselves in performance. This has had a positive impact in improving performances.
The same thing could be done for a speaking and listening activity, a presentation etc. It’s extremely powerful for the students to watch themselves again so that they can also be their own audience, especially when you want them to reflect and set their own targets.