I am surmising, that a work around was improvised.
That glitchy " Adobe flash", was being difficult with 64 bit VISTA.
With 32 bit vista, the you tube clips function.
I checked out forums to find solutions.
Some bloke mentioned, he installed microsoft " Silverlight Version 2" initially.
Then he set up adobe flash after.
The person indicated, that possibly " Silverlight" has the reliable plug ins.
I struggled , for two days with other procedures.
Not sure what files, " Silverlight Ver 3" installed on my system.
What ever they are, my adobe flash installed successfully.
Now the you tube clips can be viewed.
Someone mentioned that, ' Adobe' know their " Flash player " has issues with Vista 64 bit. :rant: