Enhance file selection to support additional audio format (M4A) and update README.md to reflect new supported formats for video and audio recordings.

FIX-GITHUB-ACTIONS.md

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+# 🔧 GitHub Actions Fix Applied
+
+## What Happened
+
+The GitHub Actions build failed because Docker registry tags must be lowercase, but the repository name "DataAnts-AI" contains uppercase letters.
+
+**Error**: 
+```
+invalid tag "ghcr.io/DataAnts-AI/VideoTranscriber:latest-gpu": repository name must be lowercase
+```
+
+## What I Fixed
+
+1. **Added Lowercase Conversion Step**:
+   ```yaml
+   - name: Convert repository name to lowercase
+     id: lowercase-repo
+     run: echo "repository=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_OUTPUT
+   ```
+
+2. **Updated All References** to use the lowercase repository name:
+   - Metadata extraction
+   - Main image build
+   - GPU image build
+
+## Current Status
+
+- ✅ **Fix Applied**: All workflow files updated
+- ⏳ **Waiting**: Next push will trigger corrected build
+- 📦 **Images**: Will be available at `ghcr.io/dataants-ai/videotranscriber:latest`
+
+## What You Should Do Now
+
+### Option 1: Wait for Prebuilt Images (Recommended)
+```bash
+# Once the GitHub Actions complete successfully, you can use:
+docker-compose -f docker-compose.prebuilt.yml up -d
+```
+
+### Option 2: Use Local Build (Immediate Fix)
+```bash
+# Use the fixed local build process:
+docker-compose down
+docker-compose up -d --build
+```
+
+## How to Check if Prebuilt Images are Ready
+
+```bash
+# Check if the image is available
+docker pull ghcr.io/dataants-ai/videotranscriber:latest
+
+# If successful, you can use prebuilt images
+docker-compose -f docker-compose.prebuilt.yml up -d
+```
+
+## Expected Timeline
+
+- **Immediate**: Local builds work with fixed dependencies
+- **~20-30 minutes**: GitHub Actions will complete and publish images
+- **Future**: All builds will use reliable prebuilt images
+
+The core application fix (PyTorch version compatibility) is already in place, so local builds should work perfectly now!