YouTube support them only through DASH Dynamic Adaptive Streaming , which means the video is split into 2 separate files - video and audio and are required to be merged together to get a fully watchable video. To merge video and audio, it requires special tools like "ffmpeg" or "avconv". That's what the helper app does, it uses "ffmpeg" to merge the video and audio together in the background once they finish to download and notifies you once it's done!
Q: Can I merge video and audio myself without the helper app? A: Ofcourse. You could choose not to install the helper app and do these merges yourself, there are plenty of guides on the Internet on how to do it. I was sceptical about an extension that hasn't been updated in nearly a year, but it works great.
At first I didn't think it was working because I expected to have to make selections at the toolbar, but the download choices are actually integrated into the page under the YouTube video title. Its easiest way to save your favourites music, videos and clips to your computer or smartphone.
Report this add-on for abuse. Report this add-on for abuse If you think this add-on violates Mozilla's add-on policies or has security or privacy issues, please report these issues to Mozilla using this form. Download YouTube videos quickly and easily - HD support with sound included! How it works? A simple red button is added to YouTube video pages, which enables you to download videos. The button is integrated in a simple manner below the video and next to other YouTube buttons see screenshots.
Click the button to populate a list of available formats to download and choose the one you want. HD video support with sound To get full support of HD videos and to overcome YouTube's technical limitations, a tiny helper app must be downloaded and integrated with this Add-on.
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