--- title: Best YouTube posts — June 2026 | daily.dev description: The most upvoted YouTube posts from June 2026, curated by the daily.dev community. canonical: https://daily.dev/sources/youtube/best-of/2026/06 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/sources/youtube/best-of/2026/06 og:type: website og:site_name: daily.dev og:title: Best YouTube posts — June 2026 | daily.dev og:description: The most upvoted YouTube posts from June 2026, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of YouTube — June 2026 1. 1 [](https://daily.dev/posts/system-design-explained-apis-databases-caching-cdns-load-balancing-production-infra-ct5l862dz "System Design Explained: APIs, Databases, Caching, CDNs, Load Balancing & Production Infra") Video YouTube · 13w System Design Explained: APIs, Databases, Caching, CDNs, Load Balancing & Production Infra A comprehensive system design course covering core infrastructure concepts from single-server setups to production-scale architectures. Topics include SQL vs NoSQL database selection, vertical vs horizontal scaling, seven load balancing algorithms (round robin, least connections, IP hash, consistent hashing, etc.), API styles (REST, GraphQL, gRPC), application protocols (HTTP/HTTPS, WebSockets, AMQP, gRPC), and transport layer protocols (TCP/UDP). Aimed at engineers preparing for system design interviews or seeking to understand how large-scale systems are architected. 123 2. 2 [](https://daily.dev/posts/what-s-new-in-flutter-tmbstlank "What's new in Flutter") Video YouTube · 12w What's new in Flutter Flutter 3.44 and Dart 3.12 were announced at Google I/O, bringing major updates across the ecosystem. Key highlights include: Dart Cloud Functions for Firebase with AOT cold starts as low as 10ms, primary constructors and private field initializers in Dart, agentic hot reload for AI coding agents, a Dart/Flutter MCP server, and Genkit Dart for building full-stack AI apps. On the platform side, iOS moves to Swift Package Manager by default (deprecating CocoaPods), Android gains hybrid composition plus for better native view rendering, and web gets a WebAssembly render path overhaul with 25-40% performance gains. Flutter's material and Cupertino design libraries are being decoupled into standalone packages for faster iteration. Canonical becomes lead maintainer for Flutter Desktop. Toyota is shipping Flutter in the 2026 RAV4 infotainment system, and LG is launching a webOS SDK for Flutter. The community has grown to 1.5 million monthly active developers with 1.3 billion pub.dev package downloads in the last 30 days. 43 3 3. 3 [](https://daily.dev/posts/fundamentals-of-backend-architecture---how-to-design-scalable-software-tqkmlxgns "Fundamentals of Backend Architecture - How to Design Scalable Software") Video YouTube · 11w Fundamentals of Backend Architecture - How to Design Scalable Software 26 3 4. 4 [](https://daily.dev/posts/900-hours-of-learning-system-design-in-9-minutes-xapegtpxm "900+ hours of Learning System Design in 9 Minutes") Video YouTube · 12w 900+ hours of Learning System Design in 9 Minutes A condensed overview of six foundational system design concepts aimed at helping engineers think architecturally rather than just memorize definitions. The six concepts covered are: statelessness (and why it enables horizontal scaling), caching (speed vs. freshness tradeoff across layers), CAP theorem (partition tolerance is a given; the real choice is consistency vs. availability), message queues (decoupling services for resilience using tools like Kafka or SQS), SQL vs. NoSQL databases (framed around ACID guarantees and workload fit), and API design (REST vs. GraphQL tradeoffs, versioning, and contract stability). The emphasis throughout is on understanding the 'why' behind each concept rather than rote memorization, with practical interview advice on how to reason through design decisions. 16 5. 5 [](https://daily.dev/posts/fable-5-for-web-design-is-next-level-3d-interactive-animated--lgqokmirg "Fable 5 for Web Design is Next Level!!! (3D, Interactive, Animated!)") Video YouTube · 11w Fable 5 for Web Design is Next Level!!! 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