Try uninstalling then reinstalling a fresh copy of the Flash Player plugin.
Uninstall Flash - http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html.
Re-install Flash - http://get2.adobe.com/flashplayer/.
YouTube videos not playing?
One of the following steps should help.
1. Install Adobe Flash Player.
2 .Are Plug-ins Enabled?
Safari > Preferences > Security
Click in the box for "Enable Plug-ins".
3. Check whether you are currently in YouTube HTML 5 trial.
At the bottom left of the page uncheck the box for
"You are currently in the HTML5 trial".
Now try YouTube.
the lookup one:
Lookup has started…
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16027
;; flags: qr rd ra; QUERY: 1, ANSWER: 9, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;youtube.com. IN ANY
;; ANSWER SECTION:
youtube.com. 591 IN MX 50 alt4.aspmx.l.google.com.
youtube.com. 591 IN MX 20 alt1.aspmx.l.google.com.
youtube.com. 591 IN MX 40 alt3.aspmx.l.google.com.
youtube.com. 591 IN MX 10 aspmx.l.google.com.
youtube.com. 591 IN MX 30 alt2.aspmx.l.google.com.
youtube.com. 170609 IN NS ns2.google.com.
youtube.com. 170609 IN NS ns1.google.com.
youtube.com. 170609 IN NS ns3.google.com.
youtube.com. 170609 IN NS ns4.google.com.
Received 216 bytes from 184.108.40.206#53 in 72 ms
the ping one:
Ping has started…
PING youtube.com (220.127.116.11): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
Request timeout for icmp_seq 4
Request timeout for icmp_seq 5
Request timeout for icmp_seq 6
Request timeout for icmp_seq 7
Request timeout for icmp_seq 8
--- youtube.com ping statistics ---
10 packets transmitted, 0 packets received, 100.0% packet loss
Alright, I figured it out and solved it. Just in case there's someone with the same problem:
I just wennt to go > go to folder > /etc
found the hosts file.
dragged it into simultron to open it.
found the two lines for youtube.com, deleted them. Saved it and it works!
Thank you to all who has tried to help :O)
You wrote above that you had changed your DNS settings, so I assume you know how to do that. In your router, change the DNS settings to use your ISP's DNS servers. Usually all you have to do to make that happen is to delete whatever you put in. The DNS server addresses should be populated automatically.
On the clients, also remove the DNS server addresses. Your router should then be used as a DNS proxy, which will refer all queries to your ISP.
Test. If there's no improvement, please repeat the Network Utility tests and post the results.
Hi. I have the same problem. My macbook pro doesnt open youtube in any browser (safari, chrome, firefox..). I tried the solution you gave us here but i cannot save the changes in the host file. Actually the file was locked to change anything but i gave permission. Then still it doesnt accept any change in the file. I am trying this on Textedit because I dont have smultron. So is there any other way you know, to solve this problem? thanks.
Hi! I had the same notice, so I didn't want to mess with it and used smultron, here's a download link for it, I think it'll work if you open it with smultron and let you save it :O) Here, give it a try: http://www.macupdate.com/app/mac/15114/smultron