The website link has lots of stuff but I actually first accessed the free content by going to podcast app and searching yoga. I found it under "20 minute yoga sessions from YogaDownload"
When I played the first one, I actually mirrored it from my ipad to my TV and soundbar as the sound is much better, but to my surprise, beyond the audio there was actual video content of them doing the postures just like in a real class. Very helpful to "see" the movement from the teacher and their students, although the podcast content has PDFs of yoga positions illustrated with names which would be very useful if you are new to yoga--
Enjoy!