The issue is telkom will not allow sending mail from addresses outside of their own network (relay not permitted)
Their old connection used Telekom as their ISP. Now they are using the Estate's ISP, which is not Telekom.
There is no fix. Telekom is anal about it. Move them to Gmail and set up...
As for anyone else facing similar issues and just wants a script to make it usable:
Im going to assume you're on a windows machine
First download and update VLC to latest (https://www.videolan.org/vlc/download-windows.html)
Then either build from git or download a recent compile of ffmpeg...
The problem ended up being hikvision using a non-standard header demux format in the mp4 files to declare video and audio formats
In reality the video stream is H.265 with a 4:2:0 8 bit BT709 colour space, and a mono AAC LC 16.0 kHz audio track
This is probably intentional to make 99% of...