Synology camera plugin configuration in child bridge mode on Homebridge - no image

Hello
I'm trying to configure the camera plugin from the Synology in child bridge mode, as it took quite a long time for the image to start in normal mode.

The question is what am I doing wrong that I am not able to get images from these cameras in this mode all the time.

After configuring it on the child bridge plugin page it added its configuration at the end, so I have:

"platforms: [
{
"name": "camera-ffmpeg",
"cameras": [
{
"name": "A",
"videoFilter": "none",
"unbridge": true,
"vcodec": "copy",
"videoConfig": {
"source": "-rtsp_transport tcp -i rtsp://admin:aa@10.10.10.22:554"
}
},
{
"name": "B",
"videoFilter": "none",
"vcodec": "copy",
"unbridge": true,
"videoConfig": {
"source": "-rtsp_transport tcp -i rtsp://admin:bb@10.10.10.23:554"
}
},
{
"name": "C",
"videoFilter": "none",
"vcodec": "copy",
"unbridge": true,
"videoConfig": {
"source": "-rtsp_transport tcp -i rtsp://admin:cc@10.10.10.21:554"
}
}
],
"platform": "camera-ffmpeg",
"_bridge": {
"username": "xx:xx:xx:xx:xx:xx:xx",
"port": 55991
}
},

Normally I get a QR code to pair and it adds this child bridge correctly to the app, but I still can't see the cameras - in bridged accessories I have blank.

Where else am I missing a piece of configuration ?

I added the child bridge definition to the camera so it looked like this

"name": "C",
"videoFilter": "none",
"vcodec": "copy",
"unbridge": true,
_bridge": {
"username": "xx:xx:xx:xx:xx:xx:xx",
"port": 55991
}
"videoConfig": {
"source": "-rtsp_transport tcp -i rtsp://admin:cc@10.10.10.21:554"
}
But it still doesn't do anything. Where am I making a mistake ?

Added after 2 [minutes]: .

The camera configuration is correct , the nonsense in it is added by the electrode editor .