I have easy worship on one systsem but I livestream from another pc, i want to be able to show scriptures while livestreaming with atem min pro

Thanks for sharing this video. However, Can I use a HDMI splitter out from the PC to the blackmagic extreme as easyworship Key and fill?  One will be use as KEY and other FILL as you mentioned in the video.  Wasn't sure they had to be separate HDMI cables from PC to Blackmagic extreme. geometry dash lite