Try Kuaishou Video Downloader (online tool) or 4K Video Downloader (desktop app) for easy and fast downloads without watermark.
K-Downloader for Kuaishou offers advanced filtering and batch loading of content directly from user page links. kuaishou video downloader without watermark
Key technical challenge: Because the watermark is part of the encoded video data, “removing” it requires post-processing (inpainting) or intercepting the video before watermark application. Try Kuaishou Video Downloader (online tool) or 4K