How to Start a Speech

Here's a speech on how to start a speech. The speaker seems to be a professional, in a business, who would be speaking at a conference.  He brings up a number of points. Please listen to his speech, and respond with your thoughts. Do you have any good ways of starting a speech? Ah... he seems to be in sales... or is referring to sales...

https://www.youtube.com/watch?v=w82a1FT5o88&t=318s

And here's a speaker who is giving a number of tips on how to start a speech. He is a professional trainer in public speaking.

https://www.youtube.com/watch?v=87cnFmCr9PY

And here is a public speaking trainer giving us both the worst and the best ways to start (and to end!) a speech!

https://www.youtube.com/watch?v=7tzentBmmUc