How to embed Youtube live chat with url permanent?

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The embed URL for a channel's live stream is:

https://www.youtube.com/embed/live_stream?channel=CHANNEL_ID

and it works but if I want to embed near at it a YouTube live chat for current streaming the URL that I use for the embed is:

https://www.youtube.com/live_chat?v=VIDEOID&embed_domain=DOMAINURL 

The problem is this: for every new live stream the Video ID changes. So that the embedded code isn't valid anymore and chat isn't displayed for next streaming.I want a permanent URL live chat valid for all my YouTube streaming without change video id manually every time. How to resolve? Perhaps with a script in PHP or javascript that read current YouTube URL and replace video id in chat embed URL? thanks

2 Answers
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