Here's what we found based on your pick's.
You will need a block or something similar around the house. Irene suggests maybe a bunched up pair of jeans, just something thicker. This is quick class that will hit the core and lead you into a nice flow.
This class has a fun warm up series, with step ups and kick outs, warriors. Be prepared to work hard, but also have some fun.
This is a studio favorite, it includes a very fun warm up b series which has deep hamstring stretches as well as warrior 1's and warrior 2's. After warm up series the class goes through a strong flow and finishes up with some deep stretches at the end.