https://www.technicalcommunity.com/InfoCenter/Pages/Speaker-Training.aspx. There are 8 videos in the series:-
1. Introduction (6 minutes 23 seconds)
2. Choosing The Right Presentation (8 minutes 30 seconds)
3. How To Explain Absolutely Anything (8 minutes 51 seconds)
4. Planning Your Presentation (22 minutes 52 seconds)
5. Nervousness And How To Overcome It (13 minutes 7 seconds)
6. How To Give Great Demos (26 minutes 9 seconds)
7. Preparing Your Laptop (19 minutes 21 seconds)
8. Presenting Your Presentation (35 minutes 39 seconds)