Is there a youtube channel, or other upload site, where someone posted videos on how to beat the single player campaign? I have trouble with some of them and would like to see how others went about it.

It took a bit of googling, but this guy has a playlist with all the old SP levels
https://www.youtube.com/watch?v=9Qqub6d9oCg&list=PLTfTr22RE0hozRtA4ZzmTQnkoqCAB2HT9

If case you want to google a tutorial, try googling for "Warlight + [level name]" (the old name of the game), you will get way more results that way.

Edited 4/27/2022 12:32:40

Thanks. Whenever I tried before I always just get results for the FPS warzone.

If you wish to get results about warzone, you must search for Warlight.
Warlight API reference.
Warlight strategy guides.
Warlight surrender tutorial.
etc.

It is a little counter-intuitive, but Fizzer's choice.