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Why is HD video lagging on Youtube?

  • CPUs
  • Video
  • Lag
  • YouTube
  • HD
Last response: in CPUs
April 12, 2009 8:23:38 AM

I can't watch HD videos on youtube without a considerable amount of video lag.

My PC:
AMD X2 5000+ 3.10GHz OC
2c 8800GT SLI

Why the hell is the video lagging for me? Is it just youtube itself?

More about : video lagging youtube

a b à CPUs
April 12, 2009 8:37:06 AM

Depends on your internet connection above all else.
April 12, 2009 8:49:49 AM

Well I have Cox high speed internet, HD videos on Vimeo play just fine.
April 12, 2009 12:04:50 PM

as Randmonizer said, its mostly dependant on your internet connection.

When you are watching yourtube hd and its lagging, go to and check your connection speed.

A lot of internet connections these days are sold as (for example) 8 megabit but are actually rate adaptive. I.e. it will give your the fastest connection it can up to a maximum speed of 8 megabit. All this depends on other network traffic. If all your neighbours are also online it will suck up the available bandwidth on your exchange.
a b à CPUs
April 12, 2009 12:06:40 PM

I pay for a 24Mbps ADSL2+ connection and rarely get over 8Mbps, usually 6-8Mbps. What you pay for means nothing ;) 
April 12, 2009 12:15:24 PM

I have a DL speed of 9.41
a b à CPUs
April 12, 2009 2:14:04 PM

I have Internet Service with Cox Cable. I read the fine print. It clearly states it will provide the claimed data transmission rate if it is available. Most of the time it is not available.
April 12, 2009 2:20:19 PM

so about 1.165 MB/s, it's not enough to stream HD video since HD video is normally 1.5MB/s.

It gets even worse when you look at Blu-Ray MB/s.
a b à CPUs
April 13, 2009 12:23:32 AM

Are you talking about 1080p HD or 720p? I think youtube only goes to 720p.
June 19, 2009 7:50:11 PM

It doesn't depend on the internet-speed! What the heck?
My computer also lags in playback WHEN IT'S DONE DOWNLOADING, so...
I always wait when it's done loading, or it will stutter around anyway, which isn't nice to look at.
But it just floods the CPU to nearly 100% usage with HD-mode on. :( 
Probably because it's a P4 èh?...