Murray...if you continue to have problems, there is always the option of downloading them and playing them at your leisure...Just in case anyone does NOT know yet how to save and/or play them, here are a couple of options.

YouRipper will save them as .flv (flash) files to your computer. It is a very easy to use & reliable piece of software.

Then you need to either have a program which will play .flv, or convert them to .mpg or something. So far, I have just kept them in the format I got them.

My favorite (at the moment) player is GomPlayer, a wonderful program which will play and display almost any kind of media ...images, sound (even midis), videos (including these .flvs). It is free and wonderful.

For just .flv files, there is this FLVPlayer. It works fine if all you want is to play the YouTube stuff.