You could just put a bowl on top of a pot of water that is boiling or close to it. Put your butter in the bowl, butter amount dependent on how much hash you have, and let the butter melt. Add your kif/kief, stir it around as it dissolves into the butter. Pour into any shape container you want your cooled butter to take the shape of and use whatever amount of butter the recipe calls when you cook.
You can use it in brownies, cookies, stir fry, whatever...
Try not to let your butter smoke too much...that means it is getting too hot and your may lose some valuable vapors...
You may have to play with your Kif/kief amount vs. butter for gauging the strength you'd like. If too strong, boil your butter and add some more etc.
Way faster and easier than that video.
There are many other videos on youtubes and goog's.
If making oil in a crockpot, you don't have to make the kif/kief, just put your plant matter into the oil on low heat and your trich's will dissolve into the oil for you. Cheese cloth the plant matter, and you're good.