At this point it is not quite clear whether D) or E) approach will be the final winner, and convey to future technologies in the field.

Although very similar in principle, as well as in realization, the difference between the two concerns information providers and media creators most. The idea is instead having many source files of the same media material prepared for different bandwidths, to have only one file.

This means that the protocol should be so efficient and intelligent to perform quality transmission and play over many bandwidths, primarily low ones, since the source should naturally be prepared for maximum viewable bandwidth of the used technology.

The most widespread technology today fits into this category - VDO Live.