I've seen this video and its been helpful for me as well OP. I used to be crazy anxious about stammering as well. Long story short I've gone through some life changes and I am now in a career that requires being constantly on the phone and dealing with customers face-to-face. Do I still stutter at times? Of course. But the longer I've been in this job the less severe its gotten. I can count the number of times someone has said anything to me about it on one hand. Worrying about your stutter does make it worse. Having hopes of a "cure" and "perfect fluency" (which even non-stutters don't have BTW) will only reinforce a negative mindset that is self-perpetuating. PWS need to be accepting of their stammer on some level.