I tested and it seems i have both ipv4 and ipv6 and in the IP config it says something something about tunneling so i suppose it's an ipv4 network with ISATAP (sorry if i'm confusing something, feel free to correct me).
But, last night i tried one last time to reinstall flash. Long story short, i haven't gotten another youtube error since but i feel like it's still too early to say it's fixed. For the flash player uninstall i used an official uninstaller from their website
then, accordinng to their directions, i manually deleted some files from C:\Windows\system32\Macromed\Flash and C:\Windows\SysWOW64\Macromed\Flash
%appdata%\Adobe\Flash Player%appdata%\Macromedia\Flash Player.
Then i reinstalled flash player and now i'm using the 32 bit version of IE9, till last night i was using the 64 bit version. Will have to see how it goes, i don't want to have high hopes and then have them crushed, i'll just see how it goes for a week. If everything checks out i'll post here and ask for the thread to be closed. Sorry to waste you're time on the youtube thingy, the DNS part was very helpfull though. Thank you all.
Since i changed DNS i noticed a slight bump in speed as well:http://www.speedtest.net/result/2257909665.png
I just switched to open DNS for both ip versions and the grade for ipv6 is 9/10 instead of 10/10 with google DNS. Something to worry about?
Test if your ISP's DNS server uses IPv6
This is a test of your ISP's resolver (instead of a test of your host). If this test passes, your DNS server (often run by your ISP) is capable of reaching IPV6-only DNS authoritative servers on the Internet. This is not critical (at this time) for you to reach sites via IPv6.
Seems to me openDNS is not that ready yet for IPv6