I love love love Fitness Blender on youtube, mostly because they are HIIT and they don't involve dancing around because I am sooo uncoordinated lol
I have checked blogilates too and she has great workouts but none over 30 minutes and I tend to feel better with longer workouts. Fitness Blender has anything from 20 minutes to 1.5 hour so it gives you a lot of options.
I have been doing the 56 minutes sweatfest this week and I love it! I can feel the burn