What about using the same videos sometimes on multiple pages?
If it makes sense to do it, then yes, for sure, you can do it.
If I have a page about roof repair, then the video would be talking about roof repair. It wouldn't make sense to put that same video on window installation.
However, if you have a video that covers multiple topics like that (like an advertising video or a hiring video), then it would make sense to put it on multiple pages.
For us, the rule in our head is "does this inform or aid in a conversion" - if the answer is yes, then it stays. Anything that is not leading toward the sale/contact gets removed (unless it's an information piece).
There are always exceptions to the rule
Even our own site, since most of our Facebook Lives were 30+ minutes, you'll see in various blog posts or pages that we queue up a section of the video for the user. It's the same video, but the information being provided when they click on it is completely different. We might talk about making a backup and installing a specific plugin, but they're two different pieces of information.