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Effective Solutions to YouTube Black Screen Black Box Problem
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Grounded on the trial-and-truth methods from various help-discussion forums and the aids from our technical supports team, here collects the most effective solutions for you to fix playback error on YouTube. The following workarounds to 'unable to play YouTube videos' issue range from the ease to the complication. You can pick out the most suitable one to have a try first.
Solution 2: Check if your network connection is good or strong, if not, you can consider to connect to Wi-fi or Cellular Data to see if YouTube video plays. (Alternatively, switch to another ISP from CenturyLink to Comcast, Time Warner Cable, AT&T or Verizon)
Solution 5: Delete temporally internet files, cache, cookie and history from Internet option and restart your computer.
Solution 6: At times, just go to YouTube page→Select Settings→Select Sign Out, which really works for some Firefox users on Mac.
Also: best video formats for YouTube; Upload HD video to YouTube for sharing
Solution 3: Update your Adobe Flash Player or Shockwave to a newer version (by the way, ensure to enable them).
Solution 4: Use Safe Mode, disable Adblock Plus and Hardware Acceleration, for such software would cause conflicts with YouTube.
Solution 7: Try changing the DNS to one of the ones available for free. It did solve YouTube won’t play problem for certain people according to the users messages left on forums.
Solution 8: Go to your display/graphics properties (right click on the desktop) and either lowering your resolution or your color quality usually from 32 bit to 16 bit (for Safari users, you can set in 32-bit mode).
Rare methods you can refer to:
1. Firefox users: Go to > Tools > Quick Preferences > Edit Site Preferences > Network tab > Browser Identification > Identify as Firefox.
2. Delete a secondary Flash player called 'Gnash'.
3. One way to get around YouTube unable to play videos problem is a VPN for CenturyLink (somewhat regret VPN is of charge with $6-9 a month).