Thanks so much!
https://youtu.be/o1pPnbuiag8?si=BAcnVI8ldsUC2FTL
The videos on this COPD site are often hard to find unless the companion article is also featured at the same time.
Here is one video on You Tube that describes the basic treatment steps correctly. Other videos below this one may go into more detail if you need it. Be well.
I don't remember seeing it