@sdetweil
I finally got it working again!:thumbs_up:

I did a full fresh installation on a new SD card with complete latest Raspian and new MM and all the modules I used before…and still the same behavior: MMM-IFrame showed nothing and I got the same warnings as mentioned below.

Then I tried MMM-SmartWebDisplay by @AgP42 which finally displays my video stream again. (BTW: This also works with other URLs as described in the documentation)
Many thanks for this module.:clapping_hands:

For all having issues with MMM-iFrame, MMM-IFrame-Ping etc., try MMM-SmartWebDisplay.
Don’t forget to do a NPM install in the module folder once the module is cloned.

Thanks, Peter

You are welcome, i had some visual basic skills in the past an trained myself javascript skills the last weeks, for modifying and writing own modules.
I am sure in a few weeks, you are helping other MM Users to do some customizing on their mirrors.

AxLED