How to Create Short Form Videos With AI

Step 1: Source Your Content

You have three source options, and the best one depends on what content assets you already have.

Repurpose existing long-form video. This is the highest-efficiency path. If you produce webinars, podcasts with video, YouTube videos, conference talks, live streams, or training recordings, you already have a library of source material. A single 30-minute video contains enough material for 10 to 20 short clips. This approach costs the least time per clip because the AI handles the extraction, selection, and reformatting.

Create original clips from scripts. If you do not have long-form video, write short scripts (50 to 150 words per clip, covering one idea per clip) and produce them with Fliki or an avatar tool like Synthesia. This takes more time per clip but gives you full control over the content and messaging.

Generate AI footage from prompts. For creative, attention-grabbing clips where uniqueness matters more than information density, text-to-video generators like Runway Gen-3 and Kling produce 5 to 15 second clips from text descriptions. Add text overlays, music, and a call to action in CapCut to turn the generated footage into a complete short.

Most teams combine all three approaches: repurposing handles the majority of output volume, original clips fill content calendar gaps, and generated footage provides creative variation.

Step 2: Generate Clips With AI

Using OpusClip for Repurposing

OpusClip is the most efficient tool for turning long-form video into short clips. Upload your video (or paste a YouTube URL), and the AI does the following in about 2 to 5 minutes:

• Analyzes the full video for conversational dynamics, topic changes, and emotional peaks
• Identifies 10 to 20 potential clip-worthy segments
• Scores each segment with a "virality score" based on hook strength, information density, and conversation completeness
• Crops the frame from 16:9 to 9:16, tracking the active speaker's face
• Adds animated captions with word-level highlighting
• Produces ready-to-post clips with titles and hashtag suggestions

The virality scoring genuinely works. Clips that OpusClip scores above 80 consistently outperform lower-scored clips in actual engagement metrics. Start by posting only clips scored 70 or above, then lower the threshold as you need more volume.

OpusClip's free tier includes 60 minutes of video processing per month. The Pro plan at $19/month handles 200 minutes. For teams producing daily content, the 200-minute allowance is usually sufficient since you upload each source video once and get multiple clips from it.

Using CapCut for Original Clips

CapCut works best when you have footage that needs editing rather than extraction. Import your clip, use AI auto-captions (the most accurate free captioning available), apply trending templates, remove background if needed, add effects, and export. The entire editing workflow for a single clip takes 5 to 15 minutes once you are familiar with the interface.

CapCut's template browser is particularly useful. Browse templates that are currently trending on TikTok, select one, and drop your footage into it. The template handles transitions, text placement, and timing. This is the fastest way to match trending formats without reverse-engineering them manually.

Using Fliki for Script-Based Shorts

Fliki lets you create short clips by typing a script, selecting a voice, and letting the AI assemble visuals. For a 30-second clip: type 75 words, select an AI voice, choose whether to use stock footage or an avatar, and export. Total production time is 5 to 10 minutes. The output quality is suitable for informational and educational short content where the voiceover carries the value.

Step 3: Add Captions and Visual Hooks

Captions are mandatory, not optional. Over 80% of short form video is watched without sound. If your clip does not have captions, 80% of your potential audience gets no value from it and swipes away immediately. Every short form clip must have burned-in captions.

The most effective caption style in 2026 uses animated word-level highlighting: each word lights up or changes color as it is spoken. This keeps the viewer's eyes engaged with the text, which increases both watch time and retention. OpusClip includes this style automatically. In CapCut, select "Auto Captions" and choose a template with word-level animation.

The hook determines everything. Short form algorithms decide whether to show your video to more people based on whether early viewers watch past the first 1 to 3 seconds. Your opening must immediately communicate value or create curiosity. Effective hooks include: a provocative statement ("Most people waste 3 hours a day on this"), a number ("$47,000 in savings with one change"), a question ("Do you know what your competitors are doing with AI video?"), or a visual surprise (unexpected footage that makes the viewer pause).

Never start with a logo, intro animation, greeting ("Hey guys"), or throat clearing. The first frame and first word should deliver value or curiosity. Move the logo to the end or skip it entirely.

End with a clear call to action. The last 3 seconds should tell the viewer exactly what to do next: follow for more, comment their experience, visit a link in bio, or check the full video. Without a CTA, even viral clips produce little measurable business result.

Step 4: Format for Each Platform

All short form platforms use 9:16 vertical format at 1080x1920 pixels. However, each platform has specific quirks that affect how you format your clips.

TikTok: Maximum length is 10 minutes, but clips under 60 seconds get the most algorithmic push. Keep the most critical content in the first 30 seconds. TikTok's creator tools include effects and filters that increase discoverability, use them when they match your content. Posting frequency matters on TikTok more than any other platform, 1 to 3 posts per day is the sweet spot for growth.

Instagram Reels: Maximum length is 90 seconds. Reels performs best with polished production quality, so clips that look too raw or unedited underperform compared to TikTok where rawness is accepted. Use CapCut templates or Fliki for Reels content if your source footage is not visually strong. Instagram hashtags are less important than on TikTok, the algorithm relies more on content quality signals.

YouTube Shorts: Maximum length is 60 seconds. YouTube Shorts are unique because they can drive traffic to your long-form YouTube channel. End Shorts with a prompt to watch the full video on your channel. YouTube's algorithm favors Shorts that maintain high completion rates, so tighter editing that eliminates any dead air is especially important here.

LinkedIn: LinkedIn does not have a dedicated shorts feature, but short vertical videos posted as regular video posts perform well. Keep LinkedIn shorts professional and insight-driven. Avoid the trendy editing styles that work on TikTok, LinkedIn audiences respond better to straightforward presentation. 30 to 60 seconds is ideal.

When posting the same clip across platforms, make small adjustments for each rather than posting identical content everywhere. Adjust caption style (TikTok prefers bolder, Instagram prefers cleaner), trim length (YouTube's 60-second limit may require cutting), and adjust tone (LinkedIn wants insights, TikTok wants energy).

Step 5: Post and Iterate Based on Data

Consistency beats quality in short form. Posting 5 times per week with decent clips outperforms posting once a week with a perfect clip. The algorithm needs regular content to learn your audience, and your audience needs regular content to form a habit of watching.

Track completion rate above all else. If viewers watch past 50% of your clip, the algorithm will push it to more people. If most viewers drop off in the first 3 seconds, your hook is failing. If they drop off at 50%, the middle content is not holding attention. Use these signals to improve your next batch.

After 2 to 4 weeks of posting, patterns emerge. Certain topics get 3x to 5x more views than others. Certain hooks keep viewers engaged. Certain clip lengths perform better on each platform. Use these patterns to refine your content strategy and your AI tool settings. Tell OpusClip to focus on specific topic keywords when extracting clips. Adjust your Fliki scripts to match the formats that your data shows work.

Batching is the key to sustainable short form output. Dedicate one session per week to generating all clips for the week. Upload your long-form content to OpusClip on Monday, review and select the best clips on Tuesday, schedule them for the week on Wednesday. The entire process takes 2 to 3 hours per week for 10 to 15 clips across 3 platforms.