How to Hide a Vowel in Southeast Asia: antivowels, why many scripts have them, why some ditched them

From a channel Lumen includes in full: NativLang animates the linguistics of the world's languages and writing systems, from cuneiform to Oceanic phylogeny, with careful sourcing and the creator's decade-plus of linguistics study.

A 13-minute video from NativLang's catalogue; the title names its topic.

Video by NativLang, played through YouTube's embedded player.