do not work when using require() with webpack

[hexray-newbee]

VIDEOJS: ERROR: The "flvjs" tech is undefined. Skipped browser support check for that tech.

[jdmoody]

@hxl-dy, I was able to get around this issue by setting global videojs and flvjs properties in Webpack using ProvidePlugin:

new webpack.ProvidePlugin({
    'window.videojs': path.resolve('node_modules/video.js/dist/video'),
    'window.flvjs': path.resolve('node_modules/flv.js/dist/flv.js')
  })