I am using one video card, an older one as well (NVIDIA GeForce GT 630). The two 24" monitors are both plugged into the same card (both via DisplayPort). They have independent displays -- it's set to Extend but of course it's not as if the system doesn't know how to select "full Screen" on either monitor (just about all programs know how to distinguish the separate monitors).
Add as many songs as you want onto your videos, including your video clips that already contain audio. You can adjust the audio volume in your video clips, which will automatically adjust the volume of the overlay music for the perfect combination. You can also completely silence your music while your video clips play so that you can hear the audio clearly without any musical accompaniment.
Themes dictate how one slide transitions to the next, how media appears in each slide, and the way text enters each new slide. Like magic, the video editor toolbar lets you swap between and preview themes and colors to settle on what best suits your video story. You can even swap out fonts and text color to best convey your message, goal, and video mood.
Finishing tools: Once you have your screen capture recording the way you want it, you can utilize the various tools included in the program to make your video complete. These include multiple Transition Options, Voice Narration, a Zoom and Pan effect, Cursor Effects, Captions, Quizzing, and more. You can also use built-in tools to enhance and improve the audio quality of your voice recording.