Here’s a solid, in-depth review of (assuming you're referring to the legacy version of YouTube's mobile interface or a specific lightweight browser extension/app that emulates the older YouTube layout).
✅ Yes – for secondary devices, retro PC builds, or focused listening. ❌ No – for daily driver, content creators, or anyone needing live features. If you instead meant a specific app named “YouTube V4 Browser” on an app store, please share a link or screenshot, and I’ll give a tailored review based on its actual features, permissions, and performance.