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This has been happening for quite a while, and it's bothering on my low-speed connection.

As you probably know, the YouTube video player caches the loaded portions of the video so one can seek to any previously-loaded part of the video without re-downloading it.

When viewing a video and the playback stops in order for the player to buffer more of the video, I usually go back to a previous already-downloaded point (less boring than staring at the throbber).

Going back

After I click on the orange area (see the screenshot above), the player seems to discard the cached file and start re-downloading the video starting at the specified point.

Why is this happening? And is there a workaround? I tried using the experimental HTML5 player; it showed the same issue.

Any ideas/insights will be extremely appreciated.

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up vote 1 down vote accepted

It's a bug that YouTube needs to fix. As the player is Flash, there's no possible workaround for this issue. But there's a better way to watch YouTube videos from a PC video player called VLC, if you don't have VLC, search the web for download links.

Open VLC Player -> Click the Media tab in the menu bar -> Select Open Network Stream and paste the video to the YouTube video you want to watch.

Tip #1: You can also play a playlist, just paste the URL to your playlist.

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It's awesome to know VLC can play YouTube videos; quite impressive. I can't seem to get it to work just now, but I'll investigate the issue. Thank you! One more thing — is the bug documented/filed? – Chris Jan 28 '13 at 13:08
I don't know, but it's a common issue, so people might have already filed the report for this bug. Also, keep your Flash player updated, to get the best out of YouTube player. – Deepak Kamat Jan 28 '13 at 15:06

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