Add Code Examples to Video Tutorial

[suiyoubi]

Description

Usage

# Add snippet demonstrating usage

Checklist

• I am familiar with the Contributing Guide.
• New or Existing tests cover these changes.
• The documentation is up to date with these changes.

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[greptile-apps]

Greptile Summary

This PR significantly enhances the video tutorial documentation by adding comprehensive Python API code examples. The changes transform a CLI-focused tutorial into a complete guide showing both command-line and programmatic approaches.

Major additions:

• New "Programmatic API Usage" section with detailed code examples
• Basic video splitting pipeline with VideoReader, FixedStrideExtractorStage, and ClipTranscodingStage
• Scene-aware splitting using TransNetV2ClipExtractionStage
• Video embeddings with CosmosEmbed1 stages
• Quality filtering examples (ClipAestheticFilterStage, MotionFilterStage)
• Caption generation workflow with CaptionPreparationStage, CaptionGenerationStage, and CaptionEnhancementStage
• Complete end-to-end pipeline example combining multiple features
• Reorganized CLI examples under "Command Line Examples" section
• Better structured embedding model comparison (Cosmos-Embed1 vs InternVideo2)

Issue found:

• Lines 363-365: Empty section header for "Cosmos-Embed1 (Recommended)" needs descriptive content

Confidence Score: 4/5

• This PR is safe to merge with one minor documentation fix needed
• The PR adds extensive documentation with code examples that align with the actual codebase implementation. All imports and API usage appear correct based on the existing video_split_clip_example.py file. The only issue is an incomplete section header that needs content added, which is a documentation formatting issue rather than a code problem.
• The Cosmos-Embed1 section header on lines 363-365 needs descriptive content added before merging

Important Files Changed

Filename	Overview
tutorials/video/getting-started/README.md	Expanded tutorial with comprehensive Python API examples and code snippets. One incomplete section header needs content (Cosmos-Embed1 description).

Sequence Diagram

sequenceDiagram
    participant User
    participant Tutorial as README.md
    participant CLI as video_split_clip_example.py
    participant API as NeMo Curator API
    
    User->>Tutorial: Read documentation
    Note over Tutorial: Quick Start section shows<br/>CLI usage
    Tutorial->>User: Shows CLI command examples
    
    User->>Tutorial: Learn programmatic usage
    Note over Tutorial: New "Programmatic API Usage"<br/>section added
    Tutorial->>User: Shows Python API examples<br/>(VideoReader, Pipeline, Stages)
    
    alt Command Line Usage
        User->>CLI: Run video_split_clip_example.py
        CLI->>API: Creates Pipeline with stages
        API->>API: Execute video curation workflow
        API->>User: Output clips + metadata
    else Programmatic Usage
        User->>API: Import stages and build Pipeline
        User->>API: Add VideoReader, Extractors, Filters
        User->>API: Run pipeline with XennaExecutor
        API->>User: Output clips + embeddings + metadata
    end
    
    Note over Tutorial: Sections include:<br/>- Basic Splitting<br/>- Scene Detection (TransNetV2)<br/>- Embeddings (Cosmos/InternVideo2)<br/>- Quality Filters<br/>- Caption Generation<br/>- Complete Examples

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[greptile-apps]

syntax: Section header for Cosmos-Embed1 is empty/incomplete.

Suggested change

	### Cosmos-Embed1 (Recommended)
	### Cosmos-Embed1 (Recommended)
	Cosmos-Embed1 provides high-quality video embeddings with 768 dimensions. It offers better performance than InternVideo2 for most use cases.