Different stability yoga movements for abs and obliques! Stability training is amazing for the midsection and athleticism in general.
Different stability exercises such as the plank are excellent for the core, but you can make the stability holds much more effective by adding some movement to the mix.
Abs 20XX program covers everything you need to hit all of the core muscles correctly to produce the best results. Abs are born when the right type of training is combined with the right diet.
The movements demonstrated in the video are a bit more challenging although many of them have easier beginner variations to start with.
Most of these movements will focus more on the core stability than mobility although many of the movements have both elements combined (mobility and stability).
Mobility is immensely important but so is core stability. Core stability will allow you to generate more power because you have more support to produce power.
Many undermine the effectiveness of yoga without understanding how powerful it really is. Yoga doesn't make you super strong, but it will make you more athletic, mobile and limber, especially when it's combined with "hard training" as we have done in Movement 20XX.
For more of this type of yoga movement, see: Fluid Yoga Movement | Open and Loosen Up the Body.