16:9 PAL anamorphic, MBAFF (interlaced or progressive depending on the content) proxed by Apache 1500 Kbps (variable from 1200 to 1800 Kbps) wrapped in an DVB transport stream and stream as a MPEG2 (DVB) TS

In order to test the streaming capability, I've used a small portion (about 600 seconds) of the movie Home realised by Yann Arthus Bertrand in 2009, copyright Europa Corp, publicly viewable on many web sites. I've added a specific page with all the disclaimer and additional informations.

After the h264 compression, the video here embedded has two further level of information reduction, from the original interlaced the encoder decided whether it is better to use frame based of field based encoding (MBAFF encoding). The original video contains many highly changing scenes (expecially the zoomed and aerial views).
The second compression is the anamorhic compression: the video size is 720x576 (the standard PAL size) with an aspect ration of 16:9, about 1.77, to be compared with 1.33 of the standard 4:3 video.

The embedded stream can be directly loaded by VLC as http://www.iginomanfre.it/PAL_1600.
The video is a h264 16:9 anamorphic 1500 Kbps CBR 25 frame per second MBAFF (using field where necessary) with 128 Kbps AAC-LC stereo 48KHz audio compressed with Rhozet Carbon Coder. The overall bitrate is 1601 Kbps VBR (the variability is mainly due to the audio). It is stream with the VLC TS (DVB) engine because FLV streamed suffers of looping problems.

This is a live streaming, not based on a slice downloaded material (such as Dinamic streaming ones are).

Unicast (unlucky)

Opening on the same PC up to three different video instances of the stream (two through a browser, one directly with VLC), the network drain on the server show this aspect

Below the number 1 two stream streams (one recalled through firefox the other via VLC), under the 2 after PAUSING VLC (at the resume, after the end of the cache, the two players were sync but the drain was equally double), under 3 opening a third drain (through explorer): 3 stream more than 5 Mbps (spikes of 6.8 Mbps, to be exact).
It's about thrice a single bitrate, despite they were about in sync and on the same machine. It is really unicast.