Yes, you can use your PS3 for livestreaming.
Yes, you can use your PS3 for livestreaming.
You can try using your PC games through the PS3, but it depends on the streaming setup. Some people have used PS3 as a source for their PC games, though compatibility and performance may vary. Check if your PC supports the necessary protocols and ensure the streaming service is set up correctly.
I thought they were merely transferring their PS3 via a capture card and some OBS software. It wasn’t really streaming the console itself.
Even with video input added, the device probably wouldn't handle more than what your computer can already do. Streaming directly from the console seems to have been included with PS4. Keep in mind we're discussing hardware from 2006, which was already less powerful than typical PCs back then. It was also too limited to stream anything beyond 480p quality. Your modern PC far surpasses that capability.