Knovio

knovio it is a fantastic tool that lets you make presentations using video as a protagonist.
the idea is to show a video and a presentation simultaneously , synchronizing the time to display the right content at the time we wish.

Advantage.  Easy acces and realization tips for creating presentation userfriendly.

disadvantages. Only offers a function you can not edit the audio or the video already recorded little privacy.      https://www.youtube.com/watch?v=EoI4Yk8EXdE