Best bet is to get a go-pro or other recording device (they come with editing software). LiveBarn is a bit too clunky unfortunately, but can be used in a pinch.
try 4k Downloader. will copy the video off YT so you can clip it locally. https://www.4kdownload.com/2
If you're on a mac you can use cmd+shift+5 to record your screen. I'm sure PC will have an equivalent.
YouCut app is super easy on the phone. Can download clips from livebarn or youtube and edit using that app.
I convert from YouTube to MP3, just Google "YouTube to MP3 Converter" and you'll get a ton of results that do it over the web in seconds for free. I download the MP3 to my Mac & use iMovie to stitch and edit. I'm sure some of the other suggestions provide better results but I'm cheap and this is super easy.
How about InStat, is that for clips or just statistics? Seems to be a bigger thing in the midwest but maybe I am just clueless.