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This question is an exact duplicate of:

When you start a video, there is a light grey bar which indicates the loading of the video. How come when I replay the video (by clicking the 'replay' button or by clicking somewhere random on the horizontal play line), the video will load/buffer again?

It never used to be like this, but recently I've noticed that for some videos, this problem occurs.

I tried on both Chrome and Firefox on Windows 7.

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marked as duplicate by Al E., Alex, Vidar S. Ramdal, Eight Days of Malaise, Sathya Jul 22 '15 at 19:06

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

I believe that you can avoid this by using YouTube HTML5, youtube.com/html5 – user35263 May 25 '13 at 9:06

Unlike Adobe Flash Player, the YouTube HTML5 Player buffers the entire video while it is playing, so there is no stuttering and you can search anywhere in the timeline of the buffered part of the video.

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I tried your solution but still the problem persists. I use Chrome (Version 28.0.1500.71 m) and after joining the HTML5 trial I restarted the browser. In the link above it says that "You are currently in the HTML5 trial". Any Ideas would be much appreciated! Thanks. – pm89 Jul 12 '13 at 0:30
Do you also have Firefox installed on your system? Firefox uses Adobe Flash Player for playing Flash videos. Chrome uses its own built-in Flash player. – karel Jul 12 '13 at 4:41
Thanks for your reply. I just installed Firefox, joined HTML5 trial, restated Firefox. But no difference yet, the video reloads after each replay or clicking/moving progress bar. I also tried different resolutions/videos. That's weird! – pm89 Jul 12 '13 at 13:01
If you've got enough RAM (4GB or else your desktop performance and stability will suffer) you can try increasing the size of the Firefox memory cache for an individual entry to 512MB. Type about:config in the Firefox URL search box and change the Value for browser.cache.memory.max_entry_size to 512000. Please post a comment if this doesn't work. – karel Jul 12 '13 at 13:13
I have made the changes, restarted Firefox, double checked the changes, but still the same! Maybe there is another problem with my Computer, I am going to try it on other computers. I have Win8, and 8Gb RAM. Thanks for your help! – pm89 Jul 13 '13 at 15:06

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