Of course we want you to buy the full video. This clip is taken directly from the film and gives some extremely useful information to viewers as an example of the quality of content they can expect. In just over a minute, you learn what type of ocean conditions alerts a sailor that it's time to heave to; using a simple sketch, your shown the basic technique to employ and the resulting slick that will keep your vessel steady once heaved to. That's important information. This is not a blaring ad with no content.
Beg to differ with you on your comment. This is a tip from this well received and highly regarded Lin & Larry Pardey video about Storm Tactics. It explains the "slick" that protects a vessel from rough seas when heaved-to. This in itself is "useful information" as many sailors do not understand why heaving-to reduces churning seas around a vessel. It took the Pardey's years to make their films and write their books. They deserve to be compensated for their efforts - just like viewers are compensated by their employers or their own enterprises for doing work or producing products. Yes, we want you to purchase the full Storm Tactics how-to video and also the companion Storm Tactics handbook. To peak your interest, we've created a RU-vid size clip of useful information.