Kaltura, Interactive Video Path
Kaltura's interactive video feature (Rapt) allows users to combine multiple videos to play along multiple paths as chosen by viewers.
Before starting, you should have all the individual video clips ready to combine, and familiarize yourself with the production process. Here is a detailed help document from Kaltura: https://knowledge.kaltura.com/help/kaltura-interactive-video-paths-user-guide
To get started, log in to mediaspace.illinois.edu and choose Interactive Video from the Add New menu. Then follow the instructions in the Kaltura help document we link to above.