All Video Downloader is a desktop program developed by KastorSoft. At 11.4 MB, it is a lightweight video downloader that you can use to search, watch, and download clips from 280 video-sharing and streaming sites. This includes platforms like YouTube, 123video, and Dailymotion. You can start downloading on All Video Downloader by pasting the URL onto the text bar or select it from its built-in web browser. While it does not explicitly say which search engine its using, it uses a HyperText Transfer Protocol Secure or HTTPS URL extension to ensure that your browsing activity is protected.