Never mind! I’m an idiot. I accidentally reactivated an old outdated YouTube embed plugin I had sitting there gathering dust. Removed that, no further problems. Please remove my ticket.
Sorry, forgot to add some relevant details (below). 1. I’m using the latest version of WooCommerce’s official Storefront theme with no modifications or child themes and 2. My WordPress version is Version 5.7.2. with PHP 7.4.15. Thanks!