Use ImageRecorder on Jupyter_Video_Widget videos

[seidlr]

Hi,

I want to use the ImageRecorder widget on a video stream of a custom widget. I use Jupyter_Video_Widget to be able to jump to special locations in a video. Under to hood it serves the video through a local webserver under http://127.0.0.1:57478/.
I thought about using the WidgetStream and the ImageRecorder to get the currently shown image in the video, but only a white image is shown.
Do you have an idea why it is not working, or another solution to my problem?
Thanks a lot!

Here is a working example showing my issue:
https://github.com/seidlr/jupyter-video-screenshot