The Trucker's Hitch is a good knot for securing light loads, or better yet, tightening staked-down tent strings or the rope holding a tarp over your hammock. The knot is great for securing loads but use caution and determine if your rope and the knot will be sufficient to secure the load. I would not use this knot in place of proper chaining techniques (besides, you're required to chain) or to secure a load that could cause injury if shifting or slipping occurred. I use this knot semi-frequently.
The Directional Figure-8 Loop is the beginning knot for a Trucker's Hitch. It is a good knot that is secure but also easy to remove. When finished correctly, it will form a figure 8 similar to the loop in the previous knots video. This is a handy knot to know and can be used in many applications including but not limited to the beginning of a Trucker's Hitch.