4K upscaling is about more than pixels. On YouTube, 4K uploads get a far higher streaming bitrate, so even viewers on 1080p screens see a cleaner picture.
| Source | Scale | Export |
|---|---|---|
| 1080p | 2× | H.264 35–45 Mbit/s, or H.265 CRF 20 |
| 720p | 3× | Same; check faces |
| 480p | 4.5× | Consider 1080p instead |
AI video models such as SeedVR and FlashVSR are compared in this video super-resolution comparison. Work out exact output sizes with the resolution calculator.