You didn't read it, but that's forgivable considering this poster's windiness.
He's not really asking about how much bandwidth, but which bandwidth. Many people today have two ISPs:
1) a cord of some kind that goes into your house. This ISP's data is effectively unlimited, or if there's a cap, it's relatively high (a few hundred gigabytes per month).
2) a radio mostly used by handheld computers. This ISP's data is limited because everyone is using the same airwaves, and using even a single gigabyte in a month, might be considered extravagant and wasteful. But most importantly: it costs more per byte than the other ISP.
Customers of the second type of ISP use terminology like "data plan." Customers of the first ISP consider "data plan" to be funny talk. And yet many of us have a foot in both worlds.
The idea is that with conventional video files, you can download it whenever you want, using whatever ISP you want. If you want to watch the video on your handheld (e.g. while commuting on subway) then you copy it over wifi or even sneakernet to the handheld. On the other hand, with DRMed streams, you can only use the whatever ISP you're able to connect to at the time you play the media. Considering that the point of handhelds is that they're most useful when you're not at home, that typically means it's going to be your radio ISP, the more expensive one. With DRMed streams, there's no time-shifting (or "network-shifting"). With conventional files, there is. So one tech costs more than the others, independent of how many bytes are involved.