Video to Simulation How To

I have a video created by a content specialist. This video was produced outside of Storyline. How can I use Articulate Storyline 360 to convert this video created by the specialist into a simulation? Every tutorial I've come across so far instructs me to use the 'Record Screen' button to record my video. However, I lack the time and expertise to re-record the video myself using Storyline since it was created by a content expert. Can Storyline convert this video into a simulation without requiring me to re-record it using the 'Record Screen' feature? Or is re-recording the video using the 'Record Screen' feature the only option?