src/third_party/web_platform_tests/media-source/webm/test-av-448k-44100Hz-1ch-640x480-30fps-10kfr-manifest.json

{
    "url": "webm/test-av-448k-44100Hz-1ch-640x480-30fps-10kfr.webm",
    "type": "video/webm;codecs=\"vp8,vorbis\""
}