html5 learning

1. The source of the page player supports multiple video files, and the browser recognizes the supported files 
<video width="320" height="240" controls="controls">
  <source src="movie.ogg" type="video/ogg">
  <source src="movie.mp4" type="video/mp4">
Your browser does not support the video tag.//Whether it supports video
</video> 
2. Three formats supported by video

    Ogg = Ogg file with Theora video encoding and Vorbis audio encoding

    MPEG4 = MPEG 4 file with H.264 video encoding and AAC audio encoding

    WebM = WebM file with VP8 video encoding and Vorbis audio encoding