Open replay with command line?

I’m working on a Fortnite replay browser app. It currently can find, read, and get basic info from the replay files. From my app, I’m trying to open the selected replay file, and scrub the replay to a specified time. I’m assuming this would be done by launching Fortnite with some command line arguments and pointing to the replay file.

I found this documentation:

The replay system documentation shows says the console commands can work as command line arguments, but they’re not shown on the command line arguments page. Experimentation hasn’t been super useful so far.

Any clues? Thanks!