使用youtube-dl从vrtnu.be下载内容持续报错，寻求技术协助

Let's break down and fix the issues you're facing step by step:

1. First, Resolve the Python Version Outdated Warning #

youtube-dl depends on specific Python versions (2.6, 2.7, or 3.2+) to run properly. An outdated Python installation is likely causing underlying compatibility glitches that trigger your repeated errors.

• For Linux/macOS:
  • Use your system package manager to update Python (e.g., sudo apt update && sudo apt install python3 for Debian/Ubuntu, or brew install python3 for macOS).
  • If you need to keep older Python versions for other tools, use pyenv to manage multiple versions cleanly.
• For Windows:
  • Download the latest supported Python version from the official Python installer, and make sure to check "Add Python to PATH" during setup to avoid path-related issues.

2. Update youtube-dl to the Latest Version #

Streaming sites like vrtnu.be frequently update their backend systems, so an outdated youtube-dl build might not support the site's current structure.

Run this command to update youtube-dl:

youtube-dl -U

If you hit permission errors (common on Linux/macOS), add sudo:

sudo youtube-dl -U

Alternatively, if you installed youtube-dl via pip, upgrade it with:

pip install --upgrade youtube-dl

(Make sure you're using the pip that matches your updated Python version—use pip3 for Python 3 if needed.)

3. Fix Your Command's Format Parameter #

Looking at your original command, you used -fmp4 which is incorrect syntax. The -f flag requires a space before the format specifier. This small mistake could be the root cause of your repeated errors.

Use this corrected command instead:

youtube-dl -v --username janvankerckhoven@gmail.com --password xxxxxx -f mp4 https://www.vrt.be/vrtnu/a-z/een-kwestie-van-geluk/seizoen-1/een-kwestie-van-geluk-d20180121-sseizoen-1a1/

-f mp4 properly tells youtube-dl to prioritize MP4 formats, which is what you intended.

4. Try Cookie-Based Authentication (If Password Login Fails) #

Some streaming sites (including vrtnu.be) use anti-bot measures or require extra verification that plain username/password login can't handle. If the above steps don't work, switch to using browser cookies:

1. Log into vrtnu.be in your web browser (Chrome or Firefox).
2. Use a cookie export extension (like Cookie-Editor) to save your cookies as a cookies.txt file.
3. Run youtube-dl with the cookies file:

youtube-dl -v --cookies cookies.txt -f mp4 https://www.vrt.be/vrtnu/a-z/een-kwestie-van-geluk/seizoen-1/een-kwestie-van-geluk-d20180121-sseizoen-1a1/

内容的提问来源于stack exchange，提问作者Jan Van Kerckhoven