: Premium status allows unrestricted downloading of HLS (HTTP Live Streaming) streams, whereas free users are limited to one download every two hours.
For many users, the free version of Video DownloadHelper is sufficient for simple downloads. However, certain advanced functions trigger "Premium" requirements: video downloadhelper firefox license key
Considering purchasing a licence - a few questions first #963 : Premium status allows unrestricted downloading of HLS
: High-definition videos that stream audio and video separately (DASH) can be merged without a watermark. video downloadhelper firefox license key
You can purchase a license directly through the extension's settings or the official Video DownloadHelper site.