Third-party software is where you will get the best control over downloading online videos. Typically, you paste the URL for the YouTube video you want into the program, and it downloads the highest quality version it can find. For videos in 1080p High Definition (HD) format, that's usually an MP4 file. For anything higher in quality—4K and even 8K videos—the file format is typically MKV.
Not to be confused with the unrelated "pro" above, Video DownloadHelper supports a huge number of sites—even those for adults. You'll know a video is downloadable when the icon for the extension animates when you're on the webpage. Video DownloadHelper for Chrome has stopped working with YouTube—so it could get placement in the Chrome Web Store. You can get around that by using the Video DownloadHelper extension for Firefox. The developer has a Kiva initiative page, where it prefers you donate funds to those in need, which has raised over $137,700.
For this software, you just need to copy the YouTube link and paste it directly into the box that’s labeled for the link. Then you get to choose the format that you want to download it into. You’re going to need to download their specific software in order to be able to download, but then you just have to click to download, and you’re all set. It really is just that easy. You can even tell it to download multiple URLs at the same time, so you can fill in everything you want to download and tell it to start while you head off to do other things.
The final option is a free YouTube channel downloader that can download from a range of different websites that include Twitter, Facebook, Vimeo, and Instagram, among others. Plus, TubeGet gives you options on the specific resolution that you want to use for the videos and even offers different video formats. All of these things mean that the video you end up with is going to be exactly what you’re looking for, without you having to settle for anything else along the way. It even gives you the option to download those videos as an MP3 so you can listen only to the audio if you prefer.
For this software, you just need to copy the YouTube link and paste it directly into the box that’s labeled for the link. Then you get to choose the format that you want to download it into. You’re going to need to download their specific software in order to be able to download, but then you just have to click to download, and you’re all set. It really is just that easy. You can even tell it to download multiple URLs at the same time, so you can fill in everything you want to download and tell it to start while you head off to do other things.

Ororsoft Youtube TV is unique software which turns your PC to customizable internet TV, bringing the best of Youtube videos to your desktop. With the channel filter feature and other useful search options you can easily find the videos you look for and play them live or download to your hard drive. The intuitive interface makes this a perfect tool for both new and experienced users - you can initiate a batch download of selected videos or watch these in live mode without having to download. Features: Youtube TV - play youtube videos from your playlist with high quality. Get the playlist searching for best ranked videos matching typed keyword or compose it by manually choosing the films. All items can be played in full screen mode with auto advance feature. Flexible search - with options to search by categories or sort by view counts, ratings and publish date. You won't need to open your browser any more to find the videos you are interested in. Filter results by channel - Search only in your favorite channels, this feature will greatly increase the effectiveness of your searches. Download or play all the videos from your favorite channels. Use this feature to backup your content of your own channel on youtube. Favorite Channel Manager - maintain the collection of your favorite channels using the predefined list of best channels in youtube category. Easy view and Quick Select modes - two modes optimized for better comfort. In "Quick select" mode you can quickly add videos to the playlist. Switch to "Easy view" mode if you prefer to see the detailed information. Download Manager - Save all your preferred videos to your hard drive by a single click. Video conversion - automatically convert videos to MPG, AVI, MP3, MOV and many other video formats. Video Player - play your downloaded videos by a simple double click, without a need for special programs or codecs.
Do you prefer to avoid installing software? Video download helper sites do the download work for you, providing conversion and then a download link—you don't have to install anything on your PC. It can take a lot longer, depending on the size and quality of the video you want—a typical two-minute movie trailer in 1080p can be around 30MB—but you can't beat the convenience.
YouTube By Click is much more than the easiest YouTube Channels Downloader! You Can download YouTube playlists. Download from almost any video site including Vimeo, Dailymotion, Facebook and many more! It's very intuitive and easy to use! Supports downloading of private YouTube and Facebook Videos. YouTube By Click has no limitation, It supports all qualities, including HD and all formats. With YouTube By Click you can download video of any length, even very long videos. YouTube By Click is 100% free!

NOTE: Beware of the ad traps on some helper sites—ads that look like they should be the download button to get your desired content, but they are not. Also, depending on the ad network employed by the site, your own virus detection software may throw up some warnings. The more the developers of sites rely on ads they don't control, or resort to trying to get you to place something on your system as "payment," the worse off we all are. 
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