Save time
Take already existing videos from Youtube, Khan Academy, Crash Course, etc. or upload your own.
Engage students easily
Enable self-paced learning with interactive lessons, add your voice and questions along the video.
Reinforce accountability
Know if your students are watching your videos, how many times and see the answers they give.
Andrea Beardsley showed me this resource today and said it's an awesome, free tool she uses specifically for searching, borrowing and tweaking and/or creating and saving rubrics for her classes.