CRITICAL GUIDELINES
Windows File Path Requirements
MANDATORY: Always Use Backslashes on Windows for File Paths
When using Edit or Write tools on Windows, you MUST use backslashes (\) in file paths, NOT forward slashes (/).
Platform Algorithms Deep Dive (2025-2026)
Complete guide to understanding and optimizing for TikTok, YouTube, Instagram, and Facebook algorithms.
Algorithm Fundamentals
How Social Algorithms Work
All major platforms use similar principles:
- Content Analysis: What is the video about?
- User Signals: How do viewers interact?
- Creator Signals: Creator history and behavior
- Distribution: Who should see this content?
- Feedback Loop: Performance adjusts distribution
Universal Algorithm Truths
Platforms Want:
- Users to stay on platform longer
- High engagement (interactions)
- Quality content that satisfies users
- Diverse content discovery
What Drives Distribution:
- Watch time (how long people watch)
- Engagement depth (comments > likes)
- Completion rates (especially for short-form)
- Sharing behavior
- Return visits
TikTok Algorithm (2025)
Algorithm Signals
| Signal | Weight | Description |
|---|---|---|
| Watch Time | Highest | Total seconds watched |
| Completion Rate | Very High | % of video watched |
| Replays | High | Video watched multiple times |
| Shares | High | Direct shares to others |
| Comments | Medium-High | Written engagement |
| Follows | Medium | New followers from video |
| Likes | Lower (2025) | Heart button taps |
2025 Update: Shallow interactions (likes) have reduced weight compared to deeper signals like watch time and replays.
TikTok's Cold Start System
How New Videos Are Tested:
- Video published
- Shown to 200-500 initial viewers
- Performance measured against benchmarks
- Strong performance = expanded distribution
- Weak performance = limited to followers
Cold Start Success Factors:
- First 3 seconds retention
- Completion rate vs video length
- Early engagement velocity
- Replay rate
TikTok Content Preferences
Algorithm Favors:
- Family-friendly content
- Positive emotional tone
- Educational value
- Authentic creator content
- Micro-niche targeting
- Trending sound usage
Algorithm Deprioritizes:
- Controversial/negative content
- Duplicated content
- Low-quality production
- Misleading thumbnails
- Watermarked content from other platforms
Micro-Niche Prioritization
2025 Algorithm Change: TikTok now heavily favors micro-niche over broad appeal.
Benefits:
- Specialized content sees 2.5x better distribution
- Algorithm micro-categorizes: "beginner leg workouts for women" vs just "fitness"
- Niche authority = more algorithm push for new content
Strategy:
- Define specific niche clearly
- Use niche-specific language and hashtags
- Build authority in one area before expanding
- Let algorithm understand your content category
TikTok For You Page (FYP)
How Videos Reach FYP:
- Initial Test: Small audience batch
- Performance Check: Engagement metrics evaluated
- Expanded Test: Larger audience if metrics strong
- FYP Placement: Continued performance = broader FYP reach
- Ongoing: Performance at each level determines next reach
FYP Success Factors:
- Hook in first 1.3 seconds
- High completion rate
- Strong replay rate
- Trending sound usage
- Relevant hashtags
TikTok Hashtag Strategy
| Hashtag Type | Purpose | Examples |
|---|---|---|
| Broad/Trending | Reach attempt | #fyp, #viral |
| Category | Topic discovery | #fitness, #cooking |
| Niche | Targeted audience | #beginneryoga, #airfryer |
| Branded | Campaign tracking | #YourBrandChallenge |
Optimal Strategy:
- 3-5 hashtags per video
- Mix of niche and category
- Quality over quantity
- Trending hashtags increase engagement 23%
TikTok Posting Schedule
| Metric | Value |
|---|---|
| Recommended frequency | 1-4 times daily |
| Views in first 24 hours | 68% |
| Peak window improvement | 30% better results |
| Growth with 2-4x daily | 2.5x higher follower growth |
YouTube Algorithm (2025)
Long-Form Algorithm Signals
| Signal | Weight | Description |
|---|---|---|
| Watch Time | Highest | Total minutes watched |
| Audience Retention | Very High | % of video watched |
| Click-Through Rate | Very High | Clicks / Impressions |
| Session Time | High | Time viewer stays on YouTube |
| Engagement | Medium | Likes, comments, shares |
| Subscriber Actions | Medium | New subs, bell clicks |
YouTube Shorts Algorithm
| Signal | Weight | Description |
|---|---|---|
| Watch Time | Highest | Per-video and cumulative |
| Completion Rate | Very High | Essential for short-form |
| Engagement | High | All interaction types |
| Swipe-Away Rate | High | Inverse signal (lower = better) |
Shorts + Long-Form Connection:
- Shorts help identify resonant audiences
- Algorithm recommends long-form to Shorts viewers
- Combined strategy = 41% faster channel growth
YouTube Discovery Mechanism
Where Videos Are Discovered:
| Source | Description |
|---|---|
| Home Feed | Personalized recommendations |
| Search | Keyword-based discovery |
| Suggested | After/alongside other videos |
| Browse Features | Trending, playlists |
| Notifications | Subscriber alerts |
| External | Google search, social shares |
YouTube SEO Signals
Ranking Factors:
| Factor | Importance |
|---|---|
| Watch time | Most important |
| Click-through rate | Very important |
| Engagement | Important |
| Keywords (title, description) | Important |
| Closed captions | 94% of top videos have them |
| Video length | 8-9 minutes best for search |
SEO Statistics:
- 25%+ of Google searches include video snippets
- Videos can get 2-5x more views from Google ranking
- Top-ranking videos average 29 months in age
YouTube Posting Schedule
| Day | Best Time | Notes |
|---|---|---|
| Tuesday | 6-9 PM | Peak performance |
| Wednesday | 6-9 PM | Peak performance |
| All weekdays | 12-3 PM | Good secondary window |
| Friday-Saturday | Afternoon | Broader engagement window |
YouTube Algorithm Optimization
Key Strategies:
-
Maximize Watch Time
- Front-load value
- Eliminate dead time
- Use pattern interrupts
-
Optimize CTR
- Test thumbnails (up to 3 variants)
- Compelling titles
- Curiosity without clickbait
-
Increase Session Time
- End screens with relevant videos
- Playlist optimization
- Content series
Instagram Algorithm (2025-2026)
Instagram Reels Algorithm
| Signal | Weight | Description |
|---|---|---|
| Topic Clarity | Very High | Clear content categorization |
| Engagement | High | Saves, shares, comments, likes |
| Watch Time | High | Duration viewed |
| Follows from Reel | High | Audience growth signal |
| Audio Usage | Medium | Trending audio preference |
December 2025 Algorithm Update
Key Change: Topic Clarity Emphasis
Instagram now prioritizes content that can be clearly categorized by topic.
Impact:
- Clear niche content gets better distribution
- Mixed-topic creators may see reduced reach
- Keyword optimization becoming more important
The 3/8/12 Rule
Instagram's content evaluation framework:
| Time | Checkpoint | Algorithm Action |
|---|---|---|
| 3 seconds | Hook evaluation | Continue or abandon |
| 8 seconds | Interest deepening | Engagement prediction |
| 12+ seconds | Value delivery | Distribution decision |
Instagram Trial Reels
New Feature (2025): Test content without risking engagement metrics.
Benefits:
- Risk-free experimentation
- No negative impact on feed
- Learn what works before full publish
- Test hooks, formats, topics
Instagram Hashtag Evolution
2025 Shift: Instagram moving from hashtags to keyword-based SEO.
New Strategy:
- Focus on keywords in caption
- Reduce hashtag quantity (3-5 vs 30)
- Posts with at least one hashtag: 12.6% more engagement
- Think "what would someone search for?"
Instagram Posting Schedule
| Day | Best Time | Notes |
|---|---|---|
| Tuesday | 11 AM - 6 PM | Peak engagement |
| Wednesday | 11 AM - 6 PM | Peak engagement |
| Thursday | 11 AM - 6 PM | Peak engagement |
Best Practices:
- Consistency matters more than perfect timing
- 1-2 Reels daily recommended
- Test different times with your audience
Facebook Reels, Platform Comparison & Optimization Framework
Detailed Facebook Reels algorithm notes, cross-platform comparison matrix, algorithm optimization framework, and upcoming changes to watch live in references/facebook-comparison-optimization.md. Load that reference when comparing platform tradeoffs or adapting one asset across multiple algorithms.
Quick Reference
Algorithm Success Checklist
TikTok:
- Hook in 1.3 seconds
- Trending or appropriate sound
- 3-5 relevant hashtags
- Clear niche focus
- High completion potential
YouTube:
- Compelling thumbnail (test 3 variants)
- Keyword-optimized title/description
- Strong hook (5-10 seconds)
- Closed captions included
- End screens/cards configured
Instagram:
- Clear topic/niche
- 3/8/12 structure
- Keyword-rich caption
- 3-5 relevant hashtags
- Sound-off friendly (captions)
Facebook:
- Share-worthy content
- Conversation starters
- Vertical format (9:16)
- Weekend timing considered
- Native upload (not cross-posted link)