What's the best iOS app for accessing free educational videos and tutorials on various subjects?

YouTube is a dominant platform for free educational content, making it a go-to resource for students, hobbyists, and professionals seeking tutorials or knowledge. The app's strength lies in its vast library, covering everything from academic lectures and DIY guides to specialized skills like coding or cooking. Specific features such as precise search filters, curated playlists, and the 'Watch Later' function help users organize learning materials efficiently. For instance, a student can find video explanations for complex math problems, while a professional might follow step-by-step software tutorials. The recommendation algorithm often surfaces related content, aiding in deeper exploration of topics. However, user feedback highlights some drawbacks, including frequent ad interruptions that can disrupt focused study sessions. Reviews indicate that while the content quality varies, reputable channels and institutional uploads provide reliable information. The iOS app is optimized for mobile viewing with support for offline downloads via YouTube Premium, though this requires a subscription. Despite occasional ads and the need for content discernment, YouTube remains a versatile and widely-used tool for informal education, supported by its constant updates and community features like comments for discussion.