I'm an unashamed fan of TechSmith and it's products. In particular, SnagIt and Camtasia.
Whenever I'm asked for a list of products that I wouldn't want to live without, SnagIt is near the top of that list. I use it all day, every day. I've tried a number of screen capture programs over the years, and I've watched people struggle to do simple things, just to avoid buying a commercial application. Don't be that person. Use the right tool.
As for Camtasia, once again it's one of my favorite products. We use it constantly for creating videos for our online training site http://training.sqldownunder.com. Once again, I've tried free options like OBS and many others. Camtasia just works. It's not worth my time messing around with something else just because they others were free.
The reason for the post today though is to call out that they've got a series of intro webinars happening. If you don't know why you should be using these apps, check out the webinars here.
Update January 2021: TechSmith has sent me details of an offer that gets you 10% off. Just use the coupon SHARECAM before Jan 20, 2021.