There’s no one who haven’t heard of YouTube. If you are a dinosaur from prehistoric times know that YouTube is a global video sharing website owned by the web giant, Google. This post is all about the Youtube video formats, their resolutions and something called iTags. This will be a very useful if you are a developer who is trying to develop a YouTube downloader script. 😉

So I’m going to describe what the iTag is in this paragraph. iTag is a numerical value defined by YouTube to identify their video formats. Ex : 22 is HD 720p mp4 video format. Ever thought how to identify the video format/type of YouTube videos to make your downloder to work? So this is how. Let’s get to work.

Widely used formats

  • iTag 5: (Basic Youtube Default)
    • Download Video Format: flv
    • Video Resolution: 400 x 240
    • Video Frame Rate: 25 fps
    • Video Output Format: FLV1 H.263
    • Audio: Stereo, 22.05 KHz 64.0 Kbps
    • Audio Format: MP3 (MPEG Audio)
  • iTag 6:
    • Download Video Format: flv
    • Video Resolution: 450 x 270
    • Format 13: (Mobile phones, iPod friendly)
    • Download Video Format: 3gp
  • iTag 17:
    • Download Video Format: 3gp
    • Video Resolution: 176 x 144
    • Video Frame Rate: 12 fps
    • Video Output Format: MPEG-4
    • Audio: Mono 22.05 KHz 24.0 – 25.6 Kbps
    • Audio Format: AAC
  • iTag 18: Medium Quality [360p]
    • Download Video Format: mp4
    • Video Resolution: 640 x 360
    • Video Frame Rate: 25 fps
    • Video Output Format: AVC (MPEG4 H.264)
    • Audio: Stereo, 44.1 KHz 96.0 – 100 Kbps
    • Audio Format: AAC
  • iTag 22: HD High Quality [720p]
    • Download Video Format: mp4
    • Video Resolution: 1280 x 720
    • Video Frame Rate: 25 fps
    • Video Output Format: AVC (MPEG4 H.264)
    • Audio: Stereo, 44.1 KHz 192.0 – 201 Kbps
    • Audio Format: AAC
  • iTag 34: [360p]
    • Download Video Format: flv
    • Video Resolution: 640 x 360
  • iTag 35: [480p]
    • Download Video Format: flv
    • Video Resolution: 854 x 480
  • iTag 36: [240p]
    • Download Video Format: 3gp
    • Video Resolution: 320 x 240
    • Video Frame Rate: 25 fps
    • Video Output Format: MPEG4 H.263
    • Audio: Mono, 22.05 KHz 32.0 – 34.2 Kbps
    • Audio Format: AAC
  • iTag 37: HD High Quality [1080p]
    • Download Video Format: mp4
    • Video Resolution: 1920 x 1080
  • iTag 38: HD High Quality [3072p]
    • Download Video Format: mp4
    • Video Resolution: 4096 x 3072
  • iTag 43: Medium Quality [360p]
    • Download Video Format: webm
    • Video Resolution: 640 x 360
    • Video Frame Rate: 24.194 fps
    • Video Output Format: VP8
    • Audio: Stereo, 44.1 KHz 128 Kbps
    • Audio Format: Vorbis
  • iTag 44: [480p]
    • Download Video Format: webm
    • Video Resolution: 854 x 480
  • iTag 45: [720p]
    • Download Video Format: webm
    • Video Resolution: 1280 x 720
  • iTag 46: [1080p]
    • Download Video Format: webm
    • Video Resolution: 1920 x 1080

 

Please note that, for some iTags there are no audio format specified or video format specified. That is because they are not present in that format.

So I believe you have a good understanding about YouTube video formats and resolutions for various iTags.