Reports coming in from the Levant continue to worsen. Here is the most recent map of their ground position, notably including significant waterways in the area.
In terms of the production values, styling, sound recording, and other points of analysis, it is possible to understand by analyzing the video what sort of resources and media infrastructure IS has at its disposal in the form of its English-language propaganda office, al-Hayat Media Center. It seems obvious to note that the film was produced digitally using HD cameras capable of being altered in speed and direction without pixelating.
I'm also posting here an excellent news documentary put out by Vice News that gives a better insight into the tactical and technological capabilities of the IS group.