Add provision for other languages in Youtube Video Block

[vishesh10]

Background

Youtube Video Block could only transcribe videos if the language was "en". This PR enhances the capability of the block for other languages as well.

• Resolves Transcribe YouTube Video Block should automatically fallback to other languages if en is not available #8422

Changes 🏗️

• Implemented the changes in the youtube.py script to return one of the available transcripts. An exception is thrown If a transcript is not available.

Test

• Happy path

• Transcript is not available

[github-actions]

This PR targets the master branch but does not come from dev or a hotfix/* branch.

Automatically setting the base branch to dev.

[qodo-merge-pro]

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis 🔶 8422 - Partially compliant Fully compliant requirements: Get list of available transcripts Check if transcript list is empty Get first available transcript in its language Get default transcript using the first available language Not compliant requirements: No explicit fallback from 'en' implemented - code just takes first available language

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Logic Issue The for loop iterates through transcript_list but only processes the first iteration since it returns immediately. This makes the loop redundant. Error Handling Generic exception catch block masks specific errors that could help in debugging issues. Consider catching specific exceptions.

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[aarushik93]

Just a comment on the expected behaviour @Torantulino is this the expected behaviour in this? Shouldn't it be to choose the language? Seems odd to me that it would just choose the first available language?

[Torantulino]

Thanks for taking this on @vishesh10!

@aarushik93 this resolves a known issue with the transcriber block that will currently fail to get a transcription even if there is a us-en transcript available and not one exactly named en. As to whether we should defaultly pick the first available transcription, that's a good question, I don't know how the application orders them. I'd assume that the first transcription available would be the native language of the video.

To default to English you can first attempt a call to: YouTubeTranscriptApi.get_transcript(video_id)

Note: By default, this will try to access the English transcript of the video.

There is other improvements that could be made here such as preferring manually created transcriptions over Google's auto-generated ones. That can be done via:
transcript.is_generated

All in all though this is an undeniable improvement over the existing functionality and a step in the right direction.

[vishesh10]

Thanks for considering the PR @Torantulino @aarushik93.

Per documentation the find_transcript method returns the manually created transcripts first. If none are found, generated transcripts are returned.