Real-ESRGAN-based open-source video super-resolution. Community-favorite fast 2× upscaler for anime and stylized footage.
From Wikipedia
Video super-resolution (VSR) is the process of generating high-resolution video frames from the given low-resolution video frames. Unlike single-image super-resolution (SISR), the main goal is not only to restore more fine details while saving coarse ones, but also to preserve motion consistency.