Video DownloadHelper is a popular browser extension available for Chrome and other browsers, designed to facilitate the downloading of videos from various websites. The premium version of this extension, Video DownloadHelper Premium, offers enhanced features compared to its free counterpart.
Video DownloadHelper is developed by a small team. The watermark and delays are their business model. If you use the tool frequently enough to be annoyed by the watermark, the Premium license is a reasonable one-time fee (usually around $18 for 1-3 computers) that supports continued development.
Alternatives to consider:
Finding a working "crack" for a Chrome extension is technically difficult and often temporary for several reasons: