Videos of circuits
We have several playlists about various circuit types on our youtube-channel:
You can check out how to use the CirNavSys on your own in the videos of the CNS-HowTo playlist.
If you are in school, you can have currents and voltages explained in the electro-basics playlist.
If you already know the basics, you can try out the playlist about digital circuits.
Or you can find short videos of various circuits, directly outputted from the CNS, in the output-playlist.