These videos are meant to be practiced in real time with your instrument.
It covers the positions in Drop 2 Drop 3, Drop 2/4 and Drop 2/3 of the extra species of the seventh chords:
 
Dominant 7th flat 5
Dominant 7th sharp 5
Minor 7th sharp 5
Diminished major 7th
 
For studying or music didactical propose!