Upgrading to the paid version removes the friction found in the freeware version: Video DownloadHelper - Free Download
However, the internet is complex. Modern streaming sites use fragmented delivery systems (HLS, DASH, M3U8 playlists) to serve video in hundreds of tiny segments. The free version of Downloadhelper handles basic detection, but the provides the "de-scrambling" engine required to reassemble these fragments into a single, seamless MP4 file.
The consumption of audiovisual media has undergone a paradigm shift over the last decade, moving from a model of local ownership (DVDs, hard drive storage) to cloud-based access (Netflix, YouTube, Vimeo). While this shift offers convenience, it creates a dependency on internet connectivity and the continued availability of content, which is subject to licensing agreements and takedown requests.