RTCMultiConnection-v1.3 is fixed for media streaming and bandwidth

Bandwidth demo:
https://webrtc-experiment.appspot.com/RTCMultiConnection/bandwidth/

Source code:

https://github.com/muaz-khan/WebRTC-Experiment/blob/master/RTCMultiConnection/RTCMultiConnection-Demos/bandwidth.html

You can set "bandwidth" like this:

connection.bandwidth = {
audio: 50,
video: 256
};

Default bandwidth for "data" m-line is 50. Customization will be
supported in next commits. E.g. you'll be able to set "bandwidth" for
data m-line like this:

connection.bandwidth = {
audio: 50,
video: 256,
data: 50
};