With the VFR system learners select video fragments of and reflect on them. At a convenient time teachers view these fragments and provide concrete, qualitative feedback. This system is developed for medical students to develop their clinical skills. See more (in Dutch): http://videofragmentrating.com/ or http://videofragmentrating.com/site/?lang=en
See references on the Dutch page, e.g. a poster: http://videofragmentrating.com/documents/Poste%20Szeged_2015%20final.pdf