@ion - I absolutely plan to expand the course out, but I'm also hedging some risk due to Phoenix 1.3 coming out 'Soon'. There are enough small changes to make me have to re-record all of the phoenix content I have in there already. After I get that update out, I intend to cover either some JSON API setup or OTP.
Regarding the pacing of the videos: its tough to get pacing video right in an online tutorial. Remember that for everyone who thinks the video is too slow, I have one person who thinks it is too fast :). Best policy is to move a bit slower, and let you use the 'video speedup' option if you want to power through it more quickly.