Notion [0] and recently released Craft [1] are both good personal-wiki applications that support lots of content types directly (from images and videos, to even things like tables and kanban-style boards for Notion), and have good mobile solutions.
Unfortunately, both are proprietary solutions that require paid subscriptions for most of their features and their own special syncing software. Craft also only runs on Apple devices at the moment (they say they're working on a web app).