Depending on the version of Captivate you have, most likely...
In the Publish settings (click File > Publish), select 'Media' on the left side (likely 3rd icon down).
From the resulting options, the first at the top under 'Select Type' choose 'F4V with fixed frame rate (*.f4v)' from the drop-down menu (or can just pick 'F4V video (*.f4v)' but I have better luck with the other one).
Select any other options you need, but that should do it...
Welcome to Adobe Forums.
You can use Captivate 5.0 to publish your project into F4V.
As per your question, Captivate published output can't to converted into F4V using Captivate.
These are two different formats of Videos, if you have interactivity in your project that publish your project's output is .swf
In Video formats you can see the content but there won't be any interactivity.
Ah, ok then, as Vikram states, you can't do direct F4V with CP 5.5.
But you can do MP4, correct? So you could publish to that...
Then use Adobe Media Encoder (assuming you have the eLearning, or similar, suite) to convert to F4V.
If no Adobe Media Encoder, there are lots of other conversion tools that'll convert MP4 to F4V...websearch!
But also as Vikram suggests, a SWF is not really a 'video' as it retains interactivity. If you publish to a true video format, like MP4 or F4V, you lose any interactivity within your CP piece...
We were having issues with one of our projects loading and playing from our INTRAnet. Someone suggested that we convert it to F4V? I was pretty sure that would strictly convert it to a movie file and remove any ineraction.
You both have confimed my opinion.