That was a big old jumble, but there were some basic points that are true (and often repeated in "how to overcome the fear of public speaking" videos): breathing and posture.

One thing that the videos I've seen on youtube that deal with public speaking don't address is practice. I used to speak in front of people all the time at my last job. Of course, since I was used to it, I was very comfortable in front of people. To me, it didn't matter if it was 5 people or 500 people. It also helped that for most of the public speaking I was doing, the people knew ahead of time that they came to hear what I had to say.

Last year, after being unemployed for several months, I was asked by a guy I know to speak to his English class at the local university. I agreed, thinking that it would be no big deal, since I have a lot of experience with that kind of thing. What I hadn't counted on was that in the intervening months, I hadn't done any public speaking and so I was out of practice. Even though I have hundreds of hours of experience in public speaking, I was nervous. My hands were shaking a little as I searched for the opportunity to engage the class and as soon as I found the opportunity and saw them respond, I calmed down.

What I'm getting at, is that public speaking is a skill. Skills need practice and use, or else they decay. This is true for every skill, even riding a bike. If you haven't ridden a bike in a while, yes you still know how to do it, but you aren't used to doing it anymore. To regain or retain the skill of riding a bike, you have to get out there and do it.

Going out and talking to groups of people one doesn't know can help immensely. For example, asking a group of people what the time is, or directions to some place are both good ways to start. Using the term Public Speaking doesn't really help internally either. What I did not see in this video was the recognition that fear is irrational. As such, it doesn't really matter how much one tries to rationalize away fear. What will take away fear is the engagement of the audience, which is something that can be practiced.