Greetings! From what I know, "eo" and "ea" in Old English are diphthongs. That means that there is a smooth shift when pronouncing each vowel and, thus, the two belong in a single syllable (e.g. loud), as opposed to the case of a hiatus (e.g. naive). But, in the same time, I've seen that both have a long variant as well, often noted "ēo" and "ēa". What puzzled me, though, is how one could pronounce these two in a long manner but still retain the character of a diphthong. And then I actually heard the two long diphthongs being pronounced in YouTube tutorials, and it seems people do pronounce them long, but they transform them into a hiatus in the process. To be more specific, I've heard the word "ġeþēod", for example, pronounced as "ġe-þē-od" (in 3 syllables), instead of "ġe-þēod" (in 2 syllables, as it should be if the "ēo" were a diphthong and not a hiatus). So, what is the explanation for this?