A good downloader should utilize your full bandwidth to ensure 4K files don't take hours to finish.
Since M4UHD doesn't provide a direct "Download" button, you can use these third-party tools to capture the video stream: m4uhd video downloader portable
Tonight was his magnum opus. He was after The Clockwork Marionette , a surrealist horror film from 1982 that had never seen a digital release. Legend said the director destroyed the reels, but a grainy, digitized VHS copy had surfaced on a private server linked through m4uhd. It was the holy grail of lost media. A good downloader should utilize your full bandwidth