Thursday, August 18, 2016

How does T-Mobile's Bing-On video down-scaling work?

I have Verizon so I don't have first hand knowledge about this. I've seen T-Mobile's "Bing-On" service which (in a violation of net neutrality...) offers unlimited video streaming which doesn't count against your data cap, with the caveat that the streaming is in standard definition (480p) max. They just recently announced new "One" plans which are Unlimited data (throttling after 26GB/mo) but it comes with the same 480p video limitation.

I've read that T-Mobile does the down-scaling on their side, to all video regardless of the source, but has also expanded the program to work with partners like YouTube to apply the limitations on their side (improving quality).

If you want HD quality video over your cellular signal, they want to charge you an extra $25/mo for that ability.

My question is, how does this all work? How does T-Mobile identify and compress video streams? Thinking of YouTube specifically, in the app I'm able to select the quality. If I were on a T-Mo plan would it somehow detect that and remove my choices for higher quality? Or would it let me chose a higher quality but then not deliver it? Finally, if I employ a VPN tunnel (such a Private Internet Access) would that allow me to get around the T-Mobile video gestapo and view video in HD without incurring the extra expense?

I guess this is similar to service providers charging extra for data tethering, and the many clever ways of masking that activity to get around it (such as VPNs).


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