I LOVE SNAGIT! I can not live without it. It is how I do almost all of my screenshots. This is how I record my videos usually. It is a one button click to create an animated GIF that I can drag into my Google Apps. It's amazing, easy, and powerful.
Snagit is a one time cost (not a subscription) for $49.95. Educators get a discount:
After recording a video using Snagit (or you can import video to Snagit) click one button to turn it into an animated GIF. I also can drag those right into Google Docs/Slides.
Your PC has the Snipping Tool and Mac users can use Control Shift 4 to take a screenshot but they are not as good as Snagit, not even close. After taking the screenshot it opens in the Snagit editor. I can easily cut out parts of the image and it auto fills it in so you would never know it was there. I can blur out student names. Add arrows and text bubbles.
Drag the altered screenshot right into Google Docs/Slides.
No question, Camtasia is a better video editor. (Or iMovie or others) However, it's also more complicated (discount price is $152). Usually I just want to edit out where the internet was slow to load or where I messed up. Snagit is awesome for this! I use the Snagit video editor every day!