Youtube does not work through squid. How to be?

Question

Squid

freebsd 11.2 gateway
squid 4.1 proxy in opaque mode.
everything works fine except youtube'a
browser hangs on "establishing a secure connection"
and bypassing the proxy works.
how to be? who has any thoughts?

Answer 1

is there anything in the squid logs?
/var/log/squid/access.log
and
/var/log/squid/cache.log
I encountered that https connections with cloud services hung, if the squid server and the client had different DNS servers on the local network. .

Answer 2

connection request is in progress.
but with this in cache.log timeout:

2018/10/15 11:23:43 kid1| local=37.98.153.251:19537 remote=173.194.73.121:443 FD 478 flags=1: read/write failure: (60) Operation timed out
2018/10/15 11:26:52 kid1| local=37.98.153.251:20483 remote=173.194.73.121:443 FD 59 flags=1: read/write failure: (60) Operation timed out

DNS for everything and everyone has one - its own BIND913 with a forward on Yandex dns (provider / google / self-recursive also tried).