what causes videos to buffer on youtube

when youtube videos buffer and stop and start...its happening a lot on my computer...i have a desktop computer with an outdated version of windows.

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ElwoodBlues · M

A low data rate causes that. And there are dozens of possible causes for low data rates.

durinsBane1983 · 46-50, M

@ElwoodBlues i've never heard of ' A low data rate' i'll have to google it.