If you were screen-capturing then you were allowing YouTube to download in your browser.
How have you blocked YT from downloading? To allow JMR to download its needs to be able to connect to youtube and its cdn servers.
Adblocker only takes effect when AUTO mode is on. There is no need to leave AUTO on at all times for this link.
You could also just use the extraction capture method that doesnt need AUTO mode to be on.
Enter https://www.youtube.com/watch?v=jQGoDi4bQgk into "Enter of Drag and Drop the url of a video page to download" and select the stream you want.
If I am miss understanding what you are asking then please describe in detail what you are trying to do.
I screen-capture 24/7 a live stream from YouTube, but a hardware failure means I now need to download it with Jaksta instead.
However, I have blocked YouTube videos from downloading (absolutely essential) so I wonder if I can make an exception for this one stream?
Desperately hoping you can help,