fix: Comment out 'innertubex' in requirements.txt

fix: Refactor polling configuration to use a list of dictionaries for accurate retry attempts; add 'innertubex' to requirements

feat: Enhance transcript extraction with multi-tier fallback; add YouTube API support and update UI to display extraction method

refactor: Clean up imports and improve file path handling in app.py and gemini_transcript.py; update requirements.txt for new dependencies

first commit