One of the better video downloaders out there. It works, and it works well. It will download content on many sites without the companion app installed, but some sites are little trickier to download content from. For those, there's an optional companion app, which helps facilitate the process. I installed the companion app, and it indeed restores functionality on some sites. I was a bit leery about the additional software so I scanned it with my anti-virus software and MalwareBytes - the optional companion app seems to be legit (no red flags so to speak) and it works.