This video was helpful. I didn't know about this vowel's pronunciation thing, at all. I recently got to know about this. And this video seemed more comfortable and easy to learn. Thank you
I think the short/long differentiation is more used in the teaching of British pronunciation (Received pronunciation) and is directly related to the [ː] symbol in IPA as in iː as a “long” version of ɪ. Indeed iː is nominally articulated for a longer time than ɪ. But, ɪ and i are different vowels themselves. In American English the length of vowel articulation is decided by following consonant, and its length is usually not reflected in IPA transcription. The long and short concept in teaching American English are totally different things. Long vowels refer to those whose AHD phonetic symbols has a “over-bar” like ā, and short vowels has a breve like ǎ. Instead, the short vowels of British English pronunciation system are the counterpart of lax vowels in American pronunciation. However, I found in linguist Peter Ladefoged work that the Americans tense/lax concept is also bogus. He argued that we can produce tax sounds with tensed muscle as long as tongues, lips etc. are at right positions.
