Hi John,

Main Causes and Solutions for YouTube Videos Not Playing

1. Browser is outdated. 

No matter what kind of browser installed on your Mac/PC/iPad iPhone (Chrome, 
Firefox, Safari, IE and more), you should consider whether your browser is 
outdated or not when YouTube videos not loading. It is right that YouTube video 
black box will not give you a technology notice like: Old Firefox version 
detected, please update your Firefox to 38.0 or higher.

Solution: Check your browser's version and compare it to the latest one. If it 
is not the latest version, then you should upgrade it following the browser 
update instruction. 

2. Haven't installed Adobe Flash Player.

As experienced YouTube users, they know it is a must to install Adobe Flash 
Player which is a plug in used by YouTube web browser. And Adobe Flash Player 
streams most of YouTube videos. For someone first came to YouTube, he/she will 
ignore Adobe Player installation note because they believe this is an unsafe 
download. And for some inexperienced YouTube users, they probably will 
encounter YouTube videos not playing too since they are unaware of the 
importance of constantly updating Adobe Flash Player plug-in. 

Solution: Install Adobe Flash Player plug-in when you came to YouTube site at 
the first time; update Adobe Flash Player according to its prompt.

Also see: How to fix YouTube not loading problem 
<safari-reader://www.macxdvd.com/mac-dvd-video-converter-how-to/how-to-fix-youtube-loading-problem.htm>;
 Fix YouTube no sound/audio issue 
<safari-reader://www.macxdvd.com/mac-dvd-video-converter-how-to/no-sound-on-youtube-videos-problem-fixed.htm>
3. Over-estimate video quality.

Certainly, everyone favors the high quality video. For making users having the 
best viewing experience, YouTube allows people to freely adjust video quality 
from low to high. Sometimes, it is feasible. But, YouTube videos won't play if 
your selected video quality is higher than its original upload quality. To be 
specific, some videos were recorded based on the standard definition so that 
they are not available in the high definition. 

Solution: In this kind of case, it is wise for you to change the quality of the 
video. You can go to the gear icon and select the quality that you prefer. By 
the way, you'd better watch YouTube video with its default video quality for 
avoiding of YouTube videos not showing. 

4. Too many cache and cookies.

It is no doubt that too many cache and cookies will also lead to video not 
playing on YouTube. Therefore, users should pay the same attention to cache and 
cookies.

Solution: Clear cache and cookies and then restart your browser to play YouTube 
videos again. 

5. JavaScript is disabled.

Maybe many people don't know what JavaScript is. But, it doesn't matter; you 
just need to know JavaScript must be enabled in your browser for purpose of 
keeping away from YouTube videos not playing. 

Solution: Enable JavaScript before you play YouTube videos.

Read: YouTube Playback Error Tackled 
<safari-reader://www.macxdvd.com/mac-dvd-video-converter-how-to/youtube-black-screen-black-box-playback-error-fixed.htm>
Cheers,
Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

El Capitan OS X 10.11.6


> On 13 Aug 2016, at 9:50 AM, John Thompson <[email protected]> wrote:
> 
> Hello list members,
>       It has been a while since I last posted but do still follow/
> 
> My problem is a reletively recenty one, only started occurring in the last 
> couple of weeks. 
> I receive several youtube clips from different, but trusted, areas and am not 
> able to open the video clip.  I have checked all the Safari settings and 
> preferences I can find but to no avail.  The sites request an update of Adobe 
> Flash Player which I have done several times.
> Can anyone shed any light on what may be causing this problem?
> 
> Regards
> 
> John Thompson
> 


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