Videos are very large files
made up of 30 still pictures (frames) per second.For the video to play seamlessly, without stopping, the video has
to be downloaded to your computer screen faster than the 30 pictures
(frames) per second that you see.
As the video is downloaded, it
placed in an area in your computer called a “Buffer”. The buffer holds the
video ready so that the frames are available to view as needed.. When your
connection is slow, the downloaded video lags the viewed video and the
computer has to wait until the buffer is filled before the video starts up
again.
It takes a good high speed Internet
connection to keep up with the video. Some wireless home networks aren’t
able to pass the video through to your wireless computer fast enough
either. Reducing the quality of the video reduces the quantity of data it
takes to make up the individual frames allowing the video to downloaded
faster.