Login examples ..
admin:admin
Encoded: YWRtaW46YWRtaW4=
666666:666666
Encoded: NjY2NjY2OjY2NjY2Ng==
Important
1) For remote access, forward the RTSP port in your router settings
2) Verify the user account actually exists and is not locked
3) DVR support for RTSP is included in 2.608+ firmware