I want to filter out a tag from the code of a page

I am querying the complete html code of the youtube video and I want to get the src link of the video

as shown here:

Do you mean that you are trying to get the url that you are feeding to http request node?

I enter the url -> I get the html code -> I filter the video tag and I want to get the src: link in the payload

Isn't the source link in the url?

In https://www.youtube.com/watch?v=R9bV2MytHr0 (What's new in Node-red 3.0), the "src" is youtubedotcom/c9ef98e4-439f-4780-a987-b62098106431

yes, how can I filter it from a page's source code?

I believe that you should be able to do that using an html node with the appropriate selector. That is not something I do often enough to be able to help with though. Start by looking at the docs to see how to do it.

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