I spent a couple of hours this weekend comparing Pi 1B+ and Pi3 for streaming video. With Pi 3 it can handle 1280x720 at 30fps with minimal delays or skipping. Pi 1B+ can’t even handle 1280x720 at 15fps.
I’ve updated the installation script for installing mjpg_streamer in the BrickPi_Python/Project_Examples/browserStreamingRobot. The old URL for mjpg on sourceforge no longer works and gets a 404. The updated script uses an experimental fork of mjpg_streamer, which has direct support for opencv filters and raspicam