The PS3's native browser is obsolete—no HTML5 video support, Flash is dead, and most modern sites simply won't load. But you still have options to watch video on the console.
Use yt-dlp or 4K Video Downloader on a computer to save videos as MP4. Copy to /VIDEO on a FAT32 USB drive. The PS3's native video player handles 1080p H.264 smoothly.
Install server software on your PC. The PS3 detects it via DLNA and streams transcoded video. Supports playlists, resume, and subtitle passthrough. Requires both devices on same network.
On a jailbroken PS3, these homebrew apps include YouTube/Dailymotion plugins with search and playback. Requires CFW (voids warranty, ban risk).
Plug a modern streaming device into the same TV. Cast from your phone. You get 4K/HDR, updated apps, voice search, and zero PS3 limitations. This is the best experience by far.
The PS3 is a 2006 machine trying to play 2024 web video. Option 4 costs $30–$50 and solves it permanently. Options 1–2 work if you're committed to the console. Option 3 is for enthusiasts only.