Chrome webrtc-internals page is tremendously useful but lacks the ability to reimport the exported dumps. This web page provides that functionality and is co-developed with the Chromium page. It also uses a better library for graphs that adds the ability to zoom into regions of interest.
I teamed up with Tsahi Levent-Levi to describe the parameters from webrtc-internals as a series of blog posts:
See also the 2017 version of that.
MIT
Note that the (awesome) Highcharts library used for plots may need a license. See http://shop.highsoft.com/faq/non-commercial