There is no auth and I didn't yet figure out what to specify Still Image Url (docs say it isn't required), but with a valid Stream Source Url (both ffplay & VLC can load it), the UI in the intergreation add just spins trying to preview the stream. Eventually it will say there was an error loading the stream and to check the logs. In the logs I find:
Logger: homeassistant.components.websocket_api.http.connection
Source: components/generic/config_flow.py:571
integration: Home Assistant WebSocket API (documentation, issues)
First occurred: 1:23:40 PM (1 occurrence)
Last logged: 1:23:40 PM
[140461101107296] Error handling message: Unknown error (unknown_error) Bill Vinson from fe80::499:15c4:eea7:119d (Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.6 Safari/605.1.15)
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/websocket_api/decorators.py", line 28, in _handle_async_response
await func(hass, connection, msg)
File "/usr/src/homeassistant/homeassistant/components/generic/config_flow.py", line 571, in ws_start_preview
user_input = flow.preview_image_settings
^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'preview_image_settings'
Anyone hit this or could possibly point out the issue?