Working config (mind the redacted bridge data) on Mac/iPad but not on iPhone. Super fluid !

config.json

{
    "bridge": {
        "name": "Homebridge REDACTED",
        "username": "00:00:00:00:00:00",
        "port": REDACTED,
        "pin": "000-11-333"
    },
    "accessories": [],
    "platforms": [
        {
            "name": "Config",
            "port": 8581,
            "platform": "config"
        },
        {
            "name": "Camera FFmpeg",
            "cameras": [
                {
                    "name": "Camera Pi",
                    "motion": true,
                    "switches": true,
                    "videoConfig": {
                        "source": "-re -f video4linux2 -video_size 1280x720 -input_format h264 -i /dev/video0",
                        "stillImageSource": "-video_size 1280x720 -f video4linux2 -i /dev/video0 -ss 1.5",
                        "maxStreams": 3,
                        "maxFPS": 30,
                        "maxBitrate": 320,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "vcodec": "copy",
                        "encoderOptions": "-b:v 320k -maxrate 320k",
                        "audio": false,
                        "debug": true
                    }
                }
            ],
            "platform": "Camera-ffmpeg"
        }
    ]
}