The out of bounds backcountry skiing and snowboarding available at Cypress mountain is actually really sick. For what is typically a 15-20 minute traverse out, you can access steep north facing slopes with fun cliffs and open glades. Note that I only noted a few lines on this north face, the areas in between that follow the slope can all be skied, however, know your way around the area as if you go down the wrong drainage as miss the traverse, you are in a world of despair with no easy way out.
Be aware that this area is north facing and often windloaded. It can and does avalanche periodically during unstable moments, especially Avalanche Alley, so you want to be sure you are familiar with the snowpack before venturing out here.
That being said, the most important element is the Traverse Route to exit from the out of bounds and re-enter back into the resort. It is a pretty mellow 10-25 minute walk (30 to break, 10 if broken and going fast) which is mostly downhill sidehill, but there are a few areas where you will have to hike just a little. DO NOT MISS THE TRAVERSE. If you miss the traverse, you're fucked, don't do it. Once you are on the traverse, you basically cut the highest and most left traverse possible until you reach the clear cut. Once you hit the clear cut, you can see the chairlift and the rest is obvious. I recommend you look at the traverse in Earth mode so you can get an idea of the mountain contour and the route you will have to take.
Otherwise, all the lines noted are super fun with some cliffs and some features. Avalanche Alley can be skied, but only on very stable days. The whole face is really sick. The far skier's right gully (line not marked) is also fun to ski, but its more mellow and flat than the lines to skiers left.
Videos' opening lines are on the NW face of Cypress, indeed most of the video is shot on Cypress. But there are definitely a bunch of clips from Whistler so don't get them mixed up.