It'd be very difficult to do a proper, well-researched documentary on the collapses at the end of the Late Bronze Age, I think. Most lectures and documentaries on the topic are far less nuanced than they ought to be.

There was not a singular collapse that affected all regions to the same degree; the end of the Late Bronze Age affected different regions in different ways over slightly different periods of time. Some cities and kingdoms were destroyed and never regained their prominence (e.g. Ugarit and Emar), some simply moved locations (e.g. Enkomi to Salamis, Alalakh to Tell Tayinat), and others were scarcely affected by the end of the Bronze Age at all (e.g. Carchemish, Byblos, Paphos). It has become increasingly clear that we must look not at the overall picture – the entirety of the eastern Mediterranean and Near East did not experience collapse – but rather specific places at specific times to understand how each of the great powers (and especially each of the regions within them) collapsed, survived, or even thrived from 1150-950 BCE. Unfortunately, this sort of nuanced analysis does not lend itself well to a documentary format.

To take the Hittite empire as an example, some of the southern parts of the empire like Tarḫuntašša and Malatya (Išuwa in the Bronze Age) essentially split off and became de facto independent states toward the end of the Bronze Age. These kingdoms preserved aspects of Hittite culture until the Neo-Assyrian conquests of the 8th/7th centuries BCE – religious beliefs and practices, Luwian and the Anatolian hieroglyphic writing system, architectural and artistic styles, administrative titles, Hittite royal names like Šuppiluliuma and Ḫattušili, etc.

The collapse of the Hittite heartland in central Anatolia was due partly to the loss of these outlying regions (the Hittite imperial core was always short on manpower and grain), but also from pressures unique to the Hittite empire, such as raids from the Kaška who lived in northern Anatolia. I discussed this more in How did the civilizations fall in the end of the Bronze Age? and When and how did we learn that the bronze age had really collapsed and was a thing and not just an imaginary folk idea like Atlantis?