I think that may have found the problem.
I use 'Download Accelerator Plus' (DAP) which has always worked in the past.
Now I right click on the file to download and then use 'Download with DAP' - thats when I get the 'long number' and no video.
I right click on the file to download and then click on 'Save As' ... that works!!
So a part solution but not the complete remedy.....I just love technology
