Since you say you’re using WordPress, I’d recommend setting up a specific category for these video posts (e.g. something like “RSS Only”) and then edit your theme files so that category never gets displayed. See Exclude Posts From Some Category « The Loop « WordPress Codex for details on what you need to change in the theme files.
you might want to take a look at RSS enclosures. (see http://en.wikipedia.org/wiki/RSS_enclosure for more information)
here is a code example:
since you seem to run wordpress, you might want to use specific video-blogging plugins.
you can find more information here: http://www.tubetorial.com/wordpress-videoblogging-the-easy-way/
Since you say you’re using WordPress, I’d recommend setting up a specific category for these video posts (e.g. something like “RSS Only”) and then edit your theme files so that category never gets displayed. See Exclude Posts From Some Category « The Loop « WordPress Codex for details on what you need to change in the theme files.