by right click on the clip-> properties.
But some can't be found by this means.
in this case, click View->Source.
the address is often after HTML key word "src" in the format of
, for example, src="http://xxxx.xxx.xxxxx.xx/xx/xxx.asf"
then, http://xxxx.xxx.xxxxx.xx/xx/xxx.asf is the address.
In most cases, the addresses can be found with these two means.