Relearn: Downloading Streamed Video to Mac

Recently, I needed to download a video stream to replay later with some edited clips to an audience. I haven't done this in a long time (via Firefox extension using Video Downloader on my old PC). Now I have a Mac and am using Google Chrome (but Video Downloader has restrictions via Chrome).

https://www.videodownloaderultimate.com/en/?p=professional

I went to this site which is probably good for PC users. But, I need a Mac solution.
https://www.videodownloaderultimate.com/en/?cid=chrome

So, here's an article I found helpful.
https://www.macworld.co.uk/how-to/mac-software/download-video-mac-3681116/
https://www.macworld.co.uk/how-to/mac-software/record-screen-mac-3527168/

Instructions

1. Open the screenshot toolbar by pressing Command + Shift + 5.
2. You can Record Entire Screen, or Record Selected Portion. Pick the one that you require.
3. If you select Record Entire Screen just click on the Record button that appears beside Option.
4. If you have more than one screen click and hold on this button and you will see the option Screen 1 and Screen 2. 
5. If you want to record a portion of the screen, select that area before triggering the recording.
6. When you have finished what you wanted to record, click the stop button that appears in the Menu bar (beside the timer), or press Shift+ Command + 5 again and press the stop button in the menu that appears.
7. The recording will appear in the bottom right corner of your screen. Click on it to open the video in Quick Look.
8. To edit your video clip, click on the trim button that appears beside Done. 
9. To trim the video clip, click on the yellow hold points at the beginning end of the recording and drag them inwards.
10. Click Done.

Cheers!