Question: Do you know of a fast and easy-to-use video upscaling tool that's suitable for cartoonish or stylized content?

If you want a fast, easy-to-use video upscaling tool for cartoonish or otherwise stylized content, TensorPix is a good choice. This cloud-based AI-powered service offers a range of video quality improvements, including upscaling to 4K, noise reduction and frame rate increase. It's accessible to people who aren't video editing experts, so it's a good general-purpose option.

Another good option is the Free AI Video Upscaler. This browser-based tool lets you upscale videos using AI algorithms in your browser without having to download anything or sign up for a service. It relies on open-source projects like Anime4K and RealESRGAN for upscaling, so it's fast and easy to use for animation and other stylized content.

For more serious needs, Pixop offers an AI-powered online video enhancer that can increase image quality to UHD 8K. It includes automated filters for ML super resolution, AI denoising and AI deep restoration. The service is geared for filmmakers and production companies trying to spruce up archival assets without heavy-duty software.

Last, VideoProc is a full-featured video processing software that supports AI technology for video upscaling, smoothing and stabilization. It can process 4K and 8K video relatively fast with minimal image quality loss, and it has other tools like video conversion and editing. It's good if you need to quickly improve video quality.