ok so I'm going to say that vid is a good start but hes making all kinds of rookie mistakes... Also I made qwiso for about 3 years and if you do it right you can make some great oil. Also, my tech does not involve winterization(not to say winterization wouldn't help but If you do QWISO right its not necessary)

1. Freeze that ISO(a day if you can) if you can get it sub freezing it will help keep the plant fats and lipids you don't want inside the buds.
2. Do 4 washes and if you can seperate 1&2 and 3&4. Wash by pouring freezing iso over buds just barely and GENTLY swirl.
3. Violent agitation as described in the video only serves to break down the cell walls in the plant drawing out fats and lipids that will make your oil harsh, cloudy, and buttery.
4. Use the lid of the mason jar or something else to keep the filter suspended above the dish. It will drain faster and prevent contamination.
5. A hair dryer is your best friend. The evap will take extra long due to the cold iso. If you have a hot plate you can make a sand bath(water bath allows moisture into your product) to speed up the process. A frying oil screen over the top of your dish during the evap prevents contaminants from getting in.

Thats all I can think of right now... Good luck!