How to pause other videos when a selected video is playing using vanilla JavaScript?

Question

I have a list of videos, I want to pause all other videos which are not targeted when one is played.

<video class="demo">
 <source src="demo1.mp4">
</video>

<video class="demo">
 <source src="demo2.mp4">
</video>

<video class="demo">
 <source src="demo3.mp4">
</video>

<video class="demo">
 <source src="demo4.mp4">
</video>