Similar to our question about the pronunciation of Latin, I believe it would be very useful for users to have a single question to reference for resources for pronouncing Greek. Greek, as with Latin, of course had several developmental stages for its pronounciation, as well as (to the best of my knowledge) a better understanding of the various dialects. I am already aware of two excellent resources to the pronounciation of Greek, which I have added as separate answers below, to follow the guidelines of these kinds of threads.
Which sources do you know of for studying and learning Ancient Greek pronunciation? Books, courses, videos and any other instructional material from reputable sources should be considered valid answers. As with the similar Latin question, I would recommend we follow the same prescript as suggested by Joonas Ilmavirta (I have replaced ‘courses’ in the below with ‘resources’, as there are numerous excellent resources on this that are not courses):
Please give only one [resource] per answer. If you have many [resources] to suggest, give multiple answers—but read the other answers to avoid duplicating answers. This way people can vote on individual [resources], causing the best ones to rise up and the worst ones to sink down, so that we can easily find the most useful resources. If there are many [resources] listed in an answer, it’s hard to link the answer score to the quality of each listed course.
― Joonas Ilmavirta
I will also provide the instructions he provided on resource posts:
Note about resource questions:
Broad resource questions like this are generally not allowed on this site. The community chooses a select few to avoid an overflow of questions of this kind. If you have an opinion on what resource questions should be asked next, post a suggestion in this meta post or vote on the existing ones. The ones to be asked will be chosen from that list according to their number of votes. If you have ideas about listing resources on this site in general, you can contribute to this meta discussion.
In particular, if you would like to ask a similar resource request question, do not just ask it, but post a suggestion in the mentioned meta post instead.