I may be wrong, but I don't think the file you downloaded has a valid extension. Not a video extension I've come across.
Along the same lines as MAJ's suggestion, try renaming the file so it has an .avi extension. You may need to change settings in Folder Options to do it the right way: on the View tab, deselect 'Hide extensions for known file types' & save changes. Then rename the file with .avi at the end. If no joy, then try the .xvid extension as MAJ suggests.
If the above is no help, where did you download it from? (Please don't post names/links if it is an adult site - this is family site, so haope you understand). The site you got it from should provide info about what to use to view it. G
Apparently the tpb file extension is a 'Downloadable PCL Soft font file backup' belonging to a shareware software program HiJaak, which is 'an image manager, graphics converter and screen capture computer program'. G
P.S. Please do not post links to any 'dodgy' sites either