Hello there, I would like to address some reasons as to why I delete newly created pages occasionally.
The main reason as to why I have been deleting pages is to keep the wiki clean, but there are other factors that go into it.
I do believe there can be a page for the OWaF April Fool's videos, but in my opinion it's preferable that it's kept to a singular page as each video doesn't have enough content to warrant their own individual pages. I also believe that creating pages can be useful, though it's best when created pages are fleshed out properly with enough content to warrant them staying on the wiki, as spam creating pages will warrant them getting deleted as they won't contribute much to the wiki unless they are well worked on.
I recommend creating pages that have good details that give enough info on the relevant page topic at hand.
I understand that it can be frustrating having pages you've created be removed, but I do hope you understand the reason behind it.
Check out your Admin Dashboard, which can be found by clicking "Admin" on the bottom toolbar. It has links to all your new tools. Please let me know if you have any questions, and good luck with your new (old) wiki!