Youplay For Youtube -

You can record a live segment and simultaneously play it back on another channel—perfect for instant replays or highlight clips during a long stream.

YouPlay is a "production playout" tool, meaning it is built for the fast-paced demands of live shows rather than automated 24/7 channel scheduling. It operates on Windows and supports professional hardware like Blackmagic cards to output high-quality video and audio signals. YouPlay for Youtube

Users can crop, zoom, or change aspect ratios (like fixing vertical phone videos for a horizontal broadcast) in real-time. You can record a live segment and simultaneously

Note that there are also unrelated mobile "YouPlay" apps on the Apple App Store designed primarily as ad-blocking browsers for personal YouTube viewing. YouPlay for Youtube