Some questions :
1) Do you want to advance the slide or video, when user clicks the next button ?
2) Which version of Captivate are you using and on which OS ?
There are several options in the properties of Video :
In Timing you can select different options like "Display For" and "Appear After".
In Transition you can select Effects, plus you can alter Effects by seconds as well
Hope it helps !!
insert a click box or a button on the slide containing video. This will pause the playback.
If you will use a click box, and cover your entire slide with it, then it will pause the project and you can click anywhere on the slide to continue the project.
The Click box is transparent by default, your video will be clearly visible to the user.
Be careful when adding an interactive object (click box or button) to the slide: be sure that the pausing point of that object is after the end of the video, or the video will be paused as well.
If you use the click box, extend its duration for the rest of the slide (CTRL-E) because its pausing point is at the end of its timeline.
For a button you can move the pausing point or set it in its Timing accordion of the Properties panel.