You can download YouTube videos with VLC or even trim videos with it.

Another such unusual use of VLC is for screen recording.

I still recommend using a proper screen recorder for this task, you are welcome to explore this VLC feature for fun.

Screen recording with VLC
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While I was able to use VLC for recording desktop screen, I could not record any sound and my mouse cursor. In my opinion, it's not a replacement of a proper screen recording tool.
To record your screen using VLC, open it and click on Media and select Convert/Save. (Or directly click on Media → Open Capture Device)

Select Convert/ Save option
Go to the "Capture Device" Tab and select Desktop from the Capture Mode dropdown list.