3. Place on low heat and stir occasionally as the liquid begins to simmer at the edges of the pan. Increase the heat very slightly to bring liquid to a gentle boil. Adjust heat if the liquid begins to boil too vigorously. Cook until the liquid is reduced to the consistency of liquid honey or maple syrup
Regarding use of sweeteners: In the video I use Lakanto monk fruit-based sweetener, which is an erythritol/monk fruit blend. This sweetener is a 1:1 ratio in sweetness with table sugar. Alternatively, you could use a stevia-based erythritol blend sweetener of your choice, such as Swerve or Sukrin. These two products, as well as most stevia based sweeteners, are also 1:1 ratio with table sugar, in sweetness. If you do not wish to use an erythritol-based sweetener, birch xylitol is also very good, as it too is 1:1 ratio, but do not buy the corn-based xylitol. You should also know that there is a cautionary note when using xylitol: ALWAYS keep any food you make with xylitol away from pets, as well as the bowls with any ingredient that has xylitol in it, because xylitol is toxic for pets (especially cats and dogs).
If it is available in your area, an allulose product, which is a rare sugar, is an excellent all-natural substitute sweetener. It is excellent for cooking and baking especially. However, it has about a 0.7:1 or 0.8:1 ratio of sweetness as compared to table sugar and the above-mentioned sweeteners, so you may have to adjust by adding more allulose (about 1/4 cup more per cup of stated sweetener) to achieve the same degree of sweetness.
If you are a diabetic please note that both xylitol and allulose will have a low but non-zero glycemic response, so use with caution, and after doing your own reading and research and, if need be, consulting your medical health advisors.