[slaymaker1907]

Word is actually really great for this stuff. You get a portable file and can add notes to the screenshots. There is even a screenshot button built into Word!

For recordings, if you use Windows you can bring up the game bar with Win+G. It has a very easy to use screen capture tool meant for gaming, but perfectly fit for small software demos. It even captures sound which is sometimes useful.

[tomatohs]

I'm working on an "instant replay for developers" desktop app for exactly this case. Create desktop instant-replays to embed in pull requests:

http://replayable.io/