hm....I just tried it and... it did work for me.
but you will need to know the way which is only coping the "embed" tag of the .html sourcecode and of course a site that allows to upload .swf
only one i know is directupload.net
and if you want to know how if have done it then here is the way.
1. upload a .swf file on directupload (not bigger then 4 MiB and of course not to big so that your sig will kill fakkuthread space)
2. you will be redirected to a new site after uploading, click on the pic on the top where the word "Datei" is written in
3. right click on empty space in the browser window and choose "show site sourcecode" or how ever it is called
4. strg + f and look for "embed" then there should be something like the one shown in the spoiler with a .swf file as the "src="
(you will have to use the quote function to see the "embed" tag completely here)
5. just copy the whole "embed" tag stating with "" and ends with "" (again use the quote finction to see what i wrote cause < and the other sign can´t be shown if they are used together)
that way it will work
and as for the bandwidth if don´t think it is a problem since it is only a hotlink to the file from another site different from the ava pic that is stored on fakku sever(and can btw still only be 82kIB ....too small).