Once you’ve installed youtube downloader app on mac or pc, you’ll see “Download” button below each video offering to download HD or mp3. NOTE: This solution only works for . By Henry T. Casey TZ Android From the safe method I use to the free (riskier) option, here are the best ways to download YouTube videos on slicelive.com: Henry T. Casey. How to download YouTube videos Download the 4K Video Downloader. Head over to the 4K Video Downloader official site Copy the YouTube video’s URL. The next step is the easiest: Just head over to Paste in the URL. Open up the 4K Video Downloader application you slicelive.comad your video. Once it has finished checking.