For Youtube | Youplay

Depending on the license, it can handle up to four independent channels . This allows you to play a video on one channel, a background animation on another, and a logo or "bumper" on a third simultaneously.

It can be triggered directly by your video mixer via LAN or IP. YouPlay for Youtube

It supports nearly all video formats (MPEG-4, Apple ProRes, DNxHD, etc.) without needing time-consuming transcoding. Depending on the license, it can handle up

It features a "freeze on last frame" option, ensuring your broadcast never accidentally cuts to a black screen after a clip ends. How it Works with YouTube Live It supports nearly all video formats (MPEG-4, Apple

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.

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

While YouPlay isn't a "YouTube-only" app, it is a staple for professional YouTube creators who use hardware mixers (like the Blackmagic ATEM).