There are a couple of comments I could make here. The big one is this.
To me the first rule of survival is to avoid putting yourself into a survival situation to start with.

These skiers were playing a dangerous game. Even though they knew the risk level was high they chose to ski down an avalanche slope and if their recovery effort had failed you can bet the local SAR unit would have been called out and expected to expose themselves to the same hazards.

We have these people getting lost and killed in avalanches every year. They can carry all the tricks they want with them but they are still knowingly placing themselves into danger.

The second comment is on the video itself.
You should have noticed how the snow broke up ahead of him and was moving. A lot of people think they can outrun an avalanche, but you usually can't because the whole slab you are on starts to move at once all together. When the avalanche starts these people are usually already in the middle of it.