Do Not download any YouTube 4K content for any piracy or illegal purposes. Build respect for YouTubers' intellectual property. Keep in mind that you're required to abide by YouTube relevant regulations and to download legal 4K content from YouTube with permission. And you're also allowed to cut, trim, split, crop and resize the downloaded 4K videos if they're too long/large for your iPhone.Ĭheck the below guide and learn how to use it to save YouTube 4K Ultra HD video to iPhone without downgrading quality if your iPhone has enough memory.

What's plus, this 4K video downloader excels in handling 4K video format issue, converting any 4K video to iPhone supported formats, be it HEVC, MKV, AVCHD, WMV, FLV, etc. over 1000 video sharing sites without auto quality degradation (e.g., downgrade to 480p, 360p, etc.). To successfully download YouTube real 4K video to iPhone (512/256GB) for excellent visual experience, you're suggested to use VideoProc Converter to save 4K 30/60FPS video from YouTube, as well as Facebook, Vimeo, Dailymotion, Instagram, etc. Why force to download something which has a worse image quality and larger size? Also, YouTube has long stopped encoding >=4K videos into AVC/H.264 and they are now provided using VP9/AV1 codecs exclusively: Youtube's WEBM videos are usually encoded using the VP9 codec which is a much more efficient and newer codec which allows to compress video better (which means a smaller file size) while providing a perceptually better image quality.Ĭan we force download 4k videos as mp4 instead of webm? Youtube's MP4 videos are encoded using the H.264/AVC codec.

Which makes me wonder that either there is some quality loss or compression in webm. I have observed that the size of mp4 videos are larger than webm for a same resolution video.

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