Can't watch the videos

I cannot watch F4 videos online. Either the the video goes black or “Server not found: rtmpt://r.acca.opentuitioncom.netdna-cdn.com:80/play” message shows up. Once I was watching the video, and after 4 minutes it started to load again and I couldn’t play the video after that. I am using Google Chrome and Adobe Flashplayer is installed in my laptop.
I tried to watch the F9 videos, and it’s not working either. Please help me with this matter because I am totally depending on Open tution for F4. Thank you.