Unfortunately, you can’t download MPEG-4 files using this method. As mentioned earlier, you can then play this file with a third-party tool. Option-double-click on it and it will download to your Mac as an flv file. In the list of links below look for an entry of several megabytes that appears to be loading. In this window you’ll see the name of the video followed by the word YouTube. Press Command-Option-A to produce Safari’s Activity window.

For example, navigate to a YouTube video you want to capture and start it playing. If you’re using Safari you’ll find that there’s no obvious command for capturing streaming YouTube videos, but it can be done with the browser’s built-in tools provided that you’re downloading a Flash file. Easy or difficult, it’s possible to capture just about any video on the Web. While you can play these videos in a browser or with a third-party application such as the VideoLAN client (or in QuickTime Player if you’ve installed the Perian plug-in), you must convert these to a format compatible with iOS devices. However, many websites continue to offer videos encoded in the Flash (flv) format. For example, it’s fairly easy to download MPEG-4-encoded content and play those videos on your Mac and iOS devices because MPEG-4 is natively supported on these devices. DownloadHelper also allows you to download files one by one, so that you keep bandwidth to surf for other stuff to download.Capturing Web video can be a one- or multi-step process, depending on how the original content is encoded and protected. Moving the mouse over the items in the menu will highlights the links directly in the page to make sure they are the ones you want to pick up. When you are on a page containing links to images or movies, you can download some or all of them at once. Since version 3.1, you can setup the extension to automatically convert the downloaded movies to your preferred video format. It also works with MySpace, Google videos, DailyMotion, Porkolt, iFilm, DreamHost and others. Just surf the Web as you are used to, when DownloadHelper detects it can do something for you, the icon gets animated and a menu allows you to download files by simply clicking an item For instance, if you go to a YouTube page, you'll be able to download the video directly on your file system. Its purpose is to capture video and image files from many sites. Super Video Downloader is a Firefox Add-on for Web content extraction.

Firefox download youtube