Here is what I have. I haven't looked for new sites for a while,...

Here is what I have. I haven't looked for new sites for a while, and there may be other URLs I haven't come across. Also, these urls are on a browser (except Brazil live), not Apple Store or Google Play apps, which could give different results.

iStream: http://stage.ivan-x.com/en/ (primary TV2U staging site url)
or http://stage.istream.ivan-x.com/en/

forjiflix (preprod?): https://forjiflix.tv2u.com/
forjiflix (staging): http://play.forjiflix.ivan-x.com/auth/signup

Brazil (staging): http://stage.tv2ubr.ivan-x.com/welcome
Brazil (analytics): http://sdp.br.tv2u.com/
Brazil (live): https://play.google.com/store/apps/details?id=com.tv2u.solgo.br&hl=en_US

All are available through a Google search so I guess not a secret.