YouTube contact? (IPv6 streaming broken)

Can someone from YouTube/Google give me a shout off list? The HTML5 player
is getting a "204 No Content" error when it sends the stream request via
IPv6...but works fine on IPv4.

Confirmed from multiple locations in the US.

- 2001:4860:400b:c01::64 returns a 204
- 2607:f8b0:4002:10::8 is about 50/50 between a 204 and 200