I just realized that I haven’t recently mentioned a very cool app that I regularly use in my teaching. Los Angeles Philharmonic bassist Brian Johnson has a great app for iOS called Learn Double Bass. This app is just 99 cents, which an insane bargain for the amount of content it contains. This app contains over 70 videos demonstrating concepts ranging from rosining the bow to executing spiccato. Multiple camera angles are used to demonstrate certain bow strokes, which is very cool.
Here’s a brief (two minute) interview with Brian from Music Lifeboat: