From Dr Geoff Lindsey.

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The Great Vowel Shift still impacts our experience of English dramatically. In this video I use animation to illustrate the GVS and its continuing developments to the present day.
***I’ve added to the captions PHONETIC SYMBOLS for each stage which time prevented me from adding to the graphics. Sorry about that.

Simon Roper’s video: https://www.youtube.com/watch?v=NckrTawTlLU
Timeline: the long and short vowels of English, pronunciation 1400 to today, by Olaf Simons
https://commons.wikimedia.org/wiki/File:Great_Vowel_Shift.svg