Summary:

This Pull Request updates the default client used by PyTube to interact with YouTube, switching from the Android client to the Web client. Additionally, the client version has been updated to ensure compatibility with YouTube's latest platform changes. These modifications address issues with inconsistent retrieval of video metadata, such as video duration.

Changes:

1. Updated Default Client:

   • Changed the default client in the Innertube class from 'ANDROID' to 'WEB' for improved reliability in fetching video metadata.

2. Updated Client Version:

   • Updated the client version in the _default_clients dictionary to '2.20230427.04.00' for better compatibility with YouTube's API.

3. Fix for Video Duration Retrieval:

   • Resolved the issue where video.length returned None due to outdated client configuration.

Motivation:

• The current Android client used by PyTube is outdated and unreliable for retrieving certain metadata (e.g., video duration).
• The Web client provides a more stable and accurate way to interact with YouTube’s platform.
• Updating the client version ensures that PyTube remains compatible with the latest YouTube API structure.

Impact:

• Improved Reliability: Fetching video metadata (e.g., duration) is now more stable and accurate.
• Better Compatibility: Updated client version ensures smooth interaction with YouTube's API.
• Backward Compatibility: No changes are required on the user end; the library's interface remains the same.

Related Issues:

• This PR addresses the issue where video.length could return None, causing errors in downstream processes that rely on video duration.

Testing:

1. The changes were tested locally with a variety of YouTube video URLs.
2. Video metadata, including duration, is now retrieved successfully for all tested videos.
3. No regressions or breaking changes were observed in existing functionality.

Notes for Reviewers:

• The changes are limited to the innertube.py file and affect the client selection and versioning.
• Please verify the updates against your test cases to ensure compatibility with additional video formats or edge cases.