I apologize for the wind noise, but, really, it's the visual you want, right?
I generally use 1/4-1/2 teaspoon of non-iodized salt in warm water. Many people prefer a mix of non-iodized salt and baking soda because it adjust the ph of the solution and may be more comfortable. Some people use water at room temperature, but I find that room temp water is not comfortable at all.
My own little testimony is that I have "dainty" nasal passages. I did not make that up, a former ENT specialist told me that. It's the only "dainty" thing about me, so don't judge. She also told me that I would continue to be plagued by sinus infections if I didn't have surgery or find something else that helped...like a neti pot.
Thankfully, the neti pot has worked. I still get sinus infections but it only gets bad enough to warrant antibiotics maybe once a year. I'm able to push through with a neti pot & pseudoephedrine combo and feel better in a matter of days instead of weeks.