Native HD + AI-upscaled 2K & 4K with real unsharp-mask sharpening — no blur, no ads
YouTube's native max is 1280×720. The 2K and 4K tiers use multi-step incremental upscaling
(repeated 1.5× passes so no single step over-blurs) then a real unsharp-mask algorithm for crisp edges.
Download saves a high-quality JPEG direct to your device.