Posted by PlanetTango, here is a link to a clip from GottaTango that demonstrates a bit of what was taught in Tuesday's class - with many more variations. The video quality isn't great but the audio instruction compensates a bit.
For those who prefer a "count" and a slightly better video quality, below is a lesson from TangoCity on ochos. This demonstrates pivots very well, but it doesn't emphasize the weight shift, and importance of changes to the embrace that signal the invitation to the ocho. Still, between the two videos, the information presented will hopefully be helpful in practicing.