Error: “YouTube Data API has not been used in project before or it is disabled”

Cause: The YouTube Data API v3 is not enabled in your Google Cloud project.

Solution: 1. Go to Google Cloud Console 2. Select your project (or create a new one) 3. Enable the YouTube Data API v3: https://console.cloud.google.com/marketplace/product/google/youtube.googleapis.com 4. Wait 2-5 minutes for the API to be fully activated 5. Try your request again

Error: “Access denied” or “Insufficient permissions”

Cause: Your OAuth scope or API key doesn’t have the required permissions.

Solution: - For OAuth: Delete .httr-oauth file and re-authenticate with yt_oauth() - For API keys: Ensure your API key has YouTube Data API permissions - Some operations (like accessing private videos) require OAuth authentication

Error: “Both app_id and app_secret are required”

Complete Setup Instructions: 1. Go to Google Cloud Console 2. Create a new project or select existing one 3. Enable YouTube Data API v3 4. Go to Credentials 5. Click “Create Credentials” > “OAuth client ID” 6. Choose “Desktop application” 7. Note the Client ID and Client Secret 8. Use: yt_oauth("your_client_id", "your_client_secret")

OAuth Browser Issues

Issue: Browser doesn’t open or redirect fails

Solutions: - Use out-of-band authentication: yt_oauth(app_id, app_secret, use_oob = TRUE) - For server environments, copy the authorization code manually - Ensure your OAuth app is configured for “Desktop application”

Error: “Quota exceeded”

Cause: You’ve exceeded your daily API quota (default: 10,000 units).

Solutions: - Wait until quota resets (daily at Pacific Time midnight) - Request quota increase in Google Cloud Console - Use batch operations to reduce quota usage - Cache results to avoid repeated API calls

Error: “Rate limit exceeded” (429)

Cause: Too many requests in a short time period.

Solution: Add delays between requests:

# Add small delays between requests
Sys.sleep(0.1)  # 100ms delay

get_captions() returns 403

Cause: Caption download requires video ownership.

Solution: You can only download captions from videos you own using OAuth authentication.

Comments functions return fewer results than expected

Cause: YouTube API has built-in limits and some comments may be hidden.

Solutions: - YouTube limits total searchable results (~500 for search, varies for comments) - Some comments may be filtered by YouTube’s spam detection - Private or deleted comments won’t appear in results

Channel lookup fails

Cause: Channel usernames may have changed to custom URLs.

Solution: Use channel IDs instead of usernames when possible:

# Instead of username
get_channel_stats(channel_id = "UC_x5XG1OV2P6uZZ5FSM9Ttw")
# Instead of 
get_channel_stats(username = "oldusername")