These are very nice stretches, the wall is a great friend of mine, just like the floor :)
The shoulder and chest opener you showed is really nice and you can get pretty deep in it too, it feels amazing!
The butt to wall poses are super nice to hold for long periods, yin style, like Lindsey says with some nice candle light and soothing music in the background. Deepen the breath and go inside, allowing the body to relax further and stretch deeper.