I recently filmed and edited a presentation for the Vancouver Sound Designers Meetup and this is how I did it using inexpensive equipment, and REAPER.
One thing I forgot to mention was that DaVinci Resolve 12 is a FREE professional program for color correction and video editing. I use it for color correction but prefer to cut in REAPER.
https://www.blackmagicdesign.com/ca/products/davinciresolve
Here’s the finished talk