Server Version#: synology ds218 play dsm 7.1
Player Version#: 1.24.5.5173-7000
the reply to my remote friend on my server is
you are not directly connecting so the quality will be poor.
You can provide to connect changing router setting.
translation from italian so can be a little difference in english.
The message means there might be some issue with your remote access configuration. If you’re experiencing the same while streaming from outside your home network, you might want to take a look at the remote access troubleshooting support article.