not following you… assuming you have given users permission to use signatures, in your profile, you should see a text entry box for your signature and another text entry box below that one for an additional way to add, in addition ot the text stuff, for an image in your signature… note my signature - an image and text… you can type a fair amount of text into that text entry box…
what exactly were you wanting to put in your signature? You can also use some html in your signature… currently, the html in your signature is limited to the same html that can be used in comments on your wp site… in the 3.1.3 bug fix release that should drop in the next couple weeks, we have increased a little bit, the different html that can be used in sigs…
sorry, no videos available… sorry you dont like the appearance of sigs - personally, I think sigs look good (mine for example)… however, you can style them away to your hearst content… just change the sfsignaturestrip css style to your hearts content… no way to please everyone on that appearance - thats why we give you css to style…