Great extension. One of the best for video downloading. Usually able to download in 90% of video streaming sites. Some videos this extension can't download though, some advanced multi-stream HLS videos this extension can't join properly and offers to downloads small chunks only. VideoDownload Helper can download multi-stream HLS, but it's paid extension. But this extension is free and works great. Hopefully in new versions support for multi-stream HLS will be added. Rating this extension as 5 stars because been using for a while and had great experience.