Based on my Yoosee cam, as above, when the Yoosee phone app is updated, and the camera firmware is updated you will need to enter a password in order to enable the RTSC stream from the camera. (As a note, I never got "Onvif" type connections to work before the upgrade, so relied on the RTSC stream, which up to then could be viewed with no authentication.
As soon as I entered the password the RTSC feed to my recorder (not CMSClient) stopped working
I eventually found that the RTSC connection URL I was using on the recording device needed to be updated to use the new RTSC connection password. And then I eventually found that the Yoosee app had allowed me to enter an RTSC password that contained special characters ("#") that the recording device did not recognise as valid in an RTSC URL string (it didn't say that as such, but I got there in the end).
Solution - use the Yoosee app on my phone to reset the camera end RTSC feed password....
Run Yoosee
Login
Select "Settings"
Select "RTSC Settings "
Select "Change Password"
Change the password , save it and then for good measure restart the camera (I disconnected/reconnected power, nothing fancy)
The RTSC URLs to type in to the recording device (or viewer such as VLC), is in the form
rtsp://admin:[RTSCPassword]@[IP_Address]:554/onvif1 (high res)
rtsp://admin:[RTSCPassword]@[IP_Address]:554/onvif2 (low res)
What threw me is that
1the camera has a "user password" and an "RTSC password", both are used against the "admin" account name,