[eltrecetv] Add new extractor

[elivinsky]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

Add extractor for eltrecetv.com.ar, the second biggest TV network in Argentina

Fixes #

Template

Before submitting a pull request make sure you have:

• At least skimmed through contributing guidelines including yt-dlp coding conventions
• Searched the bugtracker for similar pull requests
• Checked the code with flake8 and ran relevant tests

In order to be accepted and merged into yt-dlp each piece of code must be in public domain or released under Unlicense. Check all of the following options that apply:

• I am the original author of this code and I am willing to release it under Unlicense
• I am not the original author of this code but it is in public domain or released under Unlicense (provide reliable evidence)

What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)
• New extractor (Piracy websites will not be accepted)
• Core bug fix/improvement
• New feature (It is strongly recommended to open an issue first)

Copilot Summary

🤖 Generated by Copilot at 76c9268

Summary

📦📺🕵️‍♂️

Add a new extractor for El Trece TV website. The extractor is defined in the eltrecetv.py file and imported in the _extractors.py file. It can handle URLs of the format https://www.eltrecetv.com.ar/[show-name]/capitulos/temporada-[season-number]/[episode-slug]/ and extract the video ID, title, URL and thumbnail.

ElTreceTVIE class
extracts video info from
Argentine website

Walkthrough

• Add a new extractor for El Trece TV website (yt_dlp/extractor/eltrecetv.py, link)
• Import the ElTreceTVIE class in the extractors module (yt_dlp/extractor/_extractors.py, link)