This is an api, even easier because it makes the json and extracts the necessary data xD
Here is an example using this video
https://www.youtube.com/watch?v=jzi6RNVEOtA
and this is the api that gives you like several results of your search
https://line.1010diy.com/web/free-mp3-finder/query?q=jzi6RNVEOtA&type=youtube
and here it shows you the audio and video links available to download with their qualities
https://line.1010diy.com/web/free-mp3-finder/detailV1?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Djzi6RNVEOtA
So the raw URL looks like this
Search results by ID or URL
https://line.1010diy.com/web/free-mp3-finder/query?q=+YOUR CODE OR URL OF YOUTUBE+&type=youtube
Download Links (Audio & Video)
https://line.1010diy.com/web/free-mp3-finder/detailV1?url=+THE URL OF THE ITEM SELECTED+
Remove “+” signs in raw urls
Capicho? because this easy is about 1000 blocks and that's it :v jajaja [JOKE]