How to Use AI to Create Viral Short-Form Videos

Short-form video is dominating social media. Here's how AI can help you create scroll-stopping content faster.

Why Short-Form Video Matters

•TikTok, YouTube Shorts, and Instagram Reels get billions of views daily

•Attention spans are shrinking - you have 3 seconds to hook viewers

•AI makes it possible to repurpose long content into multiple clips

How Mostly's AI Finds the Best Moments

Our AI analyzes your videos for:

1. **Emotional peaks** - Moments that spark reactions

2. **Key insights** - Quotable, shareable statements

3. **Visual interest** - Action, movement, expressions

Getting Started with Mostly

Here is the fastest workflow to go from raw footage to published viral clip:

1. Import Your Source

Paste a YouTube URL or upload an MP4. Mostly supports multi-track audio and high-resolution 4K files.

2. AI Analysis & Scoring

Our Gemini-powered engine scans your content, identifying "viral triggers." Each potential clip is assigned a **Viral Score (0-100)** based on pacing, topic relevance, and emotional hook.

3. Review & Select

Browse the generated clips. Filter by topic (e.g., "Pricing," "Philosophy") using our semantic search.

4. Auto-Reframing

Convert 16:9 landscape video to 9:16 vertical instantly. Mostly's active speaker detection keeps the subject perfectly centered, even if they move around the frame.

5. Caption & Style

Apply trending caption styles with one click. Our "Karaoke" style highlights words as they are spoken, boosting retention by up to 40%.

6. Schedule & Ship

Don't just save to disk. Schedule your clips directly to TikTok, YouTube Shorts, and Instagram Reels from the Mostly dashboard.