You can filter HD videos on Hulu.com by selecting the HD checkbox at hulu.com/start/content, or directly under the TV menu:
- Log in to an account associated with a Hulu subscription
- Hover over TVat the top left of the site
- Choose either Most Popularor Recently Added
- At the top-right of the page, check the box for HD
- Your search results will be narrowed down to HD videos only
To find 4K Ultra HD content on supported devices, look for the logo on select show/movie pages.