Disclosure: I work on PixelatedFix and have a commercial interest in video-quality diagnostics. The workflow below starts with source recovery, corrected exports, and lossless transfer because those options are preferable to processing a damaged copy. A request to “make this video 4K” often arr...
Source: [Dev.to](https://dev.to/tover0314/why-upscaling-the-wrong-video-file-makes-quality-worse-a-source-first-diagnostic-workflow-2h8a)