I beg your pardon….. but a loop knot does not make a jig hang horizontally. Jig design does that, and if it is not in balance, it then requires a constriction knot to gain horizontal alignment. You can cinch a knot down to the front of the hook eye, or to the back to adjust how it hangs. A loop knot will of course allow a balanced jig to maintain a horizontal alignment with ease, and is probably the best knot for a balanced jig in many types of presentations.
I pull my jigs at a constant speed, long lining, so a loop knot is OK but not a big advantage of any kind. The knot in the video is definitely worth mastering. Learn it and you can get pretty fast at fashioning it up. I use it sometimes, and other times I tie a UNI knot. With my style it doesn’t really do anything as the jigs are not free to move, they are being forcefully pulled through the water, and the boat’s speed determines presentation and alignment.
You can see that most fishermen swear by a loop knot, and do so because they believe it produces a horizontal alignment. The jig’s design is what actually makes a jig hang horizontal. Take one that hangs nose down, tie it to a loop knot and it will hang nose down still. I have jigs that hang tail down, and I have jigs that hang horizontal.
Not trying to be special here, just saying.
I suggest that you tie your favorite jig on the line using a loop knot and allow it to dangle down. Notice how it hangs. Then tie a UNI knot to it and cinch the knot down to the front of the eye and see how the alignment changes. Cinch to the back of the eye and see what happens. Then back the knot off using your fingernails, revealing a small loop knot and see what happens. Find one that hangs head down and see how you can adjust this with a UNI knot.
Using a knot that is not a loop can change a badly balanced jig into a more balanced jig. If you feel it is highly important that the jig hang horizontal, well that is going to require more than just fastening up a loop knot. The jig heads shape, weight, the hook, the bait, and the line material will all play a role, too. Matching these up could make you a better fisherman, but consider this- When a man casts his jig out, it will sink head first, and most fish will strike on the fall of the jig. Hmmmmmmm…..
Always test your knots and keep in mind that the strongest knot wars winner is not necessarily so. Everything depends on the man twirling the line. A poorly fashioned knot can never be superior to a lesser knot when tied with skill. I suggest that the original poster develop the skill to tie the knot shown in the video, as it will serve him well going forward. No question about that. It will not however make a badly balanced jig hang on the horizontal.
BTW- A tip for those that use circle hooks. I studied and experimented and determined that there are two best knots for circle hooks. The Loop knot and the Snell. Either will out catch any of the other knots out there. Has to do with how the hook moves when being pulled back out. They allow the tip to stick the flesh in a more reliable fashion. I learned this by fishing for clever little saltwater fish.