Hi Nancy,
Thanks for your feedback. It's very helpful for me so I'm greatly appreciated.
The video about a procedure in which the doctor said "50% mortality rate" is "Diaphragm Hernia & What to do ... " by Dr. Buck Parker. It has 22K views - Published Feb 17, 2018.

Yesterday, Torrance memorial Hospital supposed to do 2 tests for me : Sniff test & CT scan, but their CT scan machine was broken so they will do it next week. The Sniff test confirmed that my right diaphragm is not moving when I inhaled & exhaled. They showed me the video of that sniff test and it was distressing for me to see my motionless right diaphragm !

I guess they probably will wait after the CT scan next week to talk to me about what to do next. Meanwhile I'm reading other posts in this Mayo Clinic Connect to learn more about various breathing techniques to deal with this problem. I also will join Facebook groups as you have suggested to study more about this disease's symptoms, causes, physical therapies, surgeries. As for now, my only option is "deep breathings" and try to relax (as I learned that emotional distress/anger could affected my breathings).
I'll update my status in the near future.
THANKS. Kevin