Alternate Site if the youtube vid doesn't help.
I tried to download swype following the instructions on the youtube video but had no luck with it. If you want a site to go to to download it directly to your phone, click the search button and type in "swype apk file". Click on the first link (the title is something like "in case you missed it..." Click the link on that page from your Incredible. Download Astro File manager from Android Market. Open the file manager and look for the swype file. open it up and click accept to all of the prompts. Next time you are in a text message, hold onto the text input box until you get a popup. It will say input method, click that and then change to swype. Hope this helps!