Academy of High Valyrian videos on YouTube.
I was looking for resources that would help me with pronunciation of High Valyrian and these videos came up. There are 20 short videos. I have watched the first few and they seem good.
Here is a link to a two and half minute long speech in High Valyrian by Daenerys: www.youtube.com/watch?v=lhW3U5555SI
Do you have any good audio or video resources for High Valyrian?
You can find a few links to Valyrian audio sources here - https://wiki.dothraki.org/High_Valyrian_Audio_sources
Also, keep in mind the actors' pronunciation isn't always perfect, it is just "good enough".