Here's my first shot a making a video about the pronunciation I use for Koine Greek. I"m sure I butcher accents and stumble over plenty of words. But here it is anyway. It uses some vocab that I found reading Dionysis Thrax's Τέχνη Γραμματική (Art of Grammar??).
ἀποτελεῖ 'it produces' was interesting to me as it is used to talk about the sound a letter makes.
Click here to listen to or download the audio