During the recording, you may need to click the 'printscreen' button to force a still capture of the required detail.
Clicking the mouse will also cause this, but depending on your settings, will also add a mouse item, click box, and possibly a text caption. Using the printscreen button is the best practice, and will be needed to capture tooltips.
Generally, I'll add a still before and after scrolling, or after a new page loads. On some websites, typically those programmed with AJAX techniques, the partial refresh of a page is not captured unless printscreen is used.