How to Make AI Video Ads

The script is the most important variable in a video ad. Production quality matters far less than the first two seconds.

The hook rule: the first 2 seconds of your video must give the viewer a specific reason to keep watching.

On TikTok and Meta Reels, a viewer's thumb stops scrolling for a pattern interrupt: an unexpected statement, a polarizing question, a specific number, or a visual surprise.

Generic openers like "Hey, check out this product" are skipped before the first second is complete.

Hook frameworks that work in direct-response video ads:

• Problem statement hook: "If you're spending $500 a month on [pain point], here's what you're missing."
• Counter-intuitive claim hook: "The reason your ads aren't converting has nothing to do with your creative."
• Specific result hook: "This changed how I [specific measurable outcome] in 14 days."
• Direct address hook: "[Target customer type], this is for you."

Script length by format: 15 to 30 second ads convert best for cold audiences on TikTok and Meta. Keep scripts to 60 to 90 words for a 15-second video. Longer scripts (60 seconds) work for retargeting audiences who are already familiar with the product.

Write 5 to 10 hook variations for every core concept. You do not know which hook will win until you test it, and AI generation makes producing all 10 variants nearly free.

Choose your AI generation approach based on the ad format you need:

Practical tips for generation quality:

• Be specific in your prompt or script. Vague input produces generic output. Name the product, the target customer, the specific problem, and the desired outcome.
• Generate all your hook variants in one session before reviewing. Reviewing and iterating as you go breaks focus.
• For talking-head ads, match actor demographics to your target audience persona. Audiences respond better to presenters they identify with.
• Request multiple aspect ratio exports if you are running on both TikTok (9:16) and Meta Feed (1:1 or 4:5). Most tools support this in a single render pass.

Captions are not optional. On TikTok, 93 percent of users watch with sound on, but captions still increase watch time and accessibility. On Instagram and Facebook, a large share of video is consumed in silent environments, making captions essential for comprehension.

Caption best practices for video ads:

• Use large, bold text with high contrast. Thin fonts at small sizes are unreadable on mobile screens. Minimum 36px font size is a common starting point.
• Animated word-by-word captions (where each word highlights as it is spoken) outperform static subtitle-style captions for retention. Most AI video tools offer this as the default.
• Keep captions inside the safe zone. On TikTok, avoid the top 150 pixels and bottom 175 pixels, where the UI overlays profile icons and share buttons. On Meta Reels, avoid the bottom 20 to 35 percent of the frame.
• Do not put your CTA or key product claim in an area that may be obscured by platform UI.
• For compliance with TikTok's AI labeling policy (as of June 2026): AI-generated captions and AI-written scripts do not require an AIGC label. If the video features a fully AI-generated visual presenter or AI-generated synthetic human face, you do need the label in the first 2 seconds.

Export your video to the correct specifications before uploading. Platform algorithms penalize low-resolution or incorrectly sized creative in the auction.

TikTok In-Feed Ads (verified June 2026):

• Aspect ratio: 9:16 (vertical)
• Resolution: 1080 x 1920 pixels
• Format: MP4 or MOV, H.264 codec
• Max file size: 500 MB
• Duration: 9 to 60 seconds for standard ads (up to 10 minutes supported as of July 2025 update, but 9 to 15 seconds drives highest engagement)
• Safe zone: keep critical content away from top 150px and bottom 175px
• Bitrate: minimum 516 kbps

Meta Reels (Facebook and Instagram, verified June 2026):

• Aspect ratio: 9:16 (recommended), 4:5 also accepted for Feed placements
• Resolution: 1080 x 1920 pixels minimum, 1440 x 2560 recommended for high-density screens after Meta's Andromeda update (October 2025)
• Format: MP4 or MOV, H.264
• Max file size: 4 GB
• Safe zone: keep critical elements 14% from top and 20 to 35% from bottom

If your AI tool exports at a lower resolution than 1080 x 1920, re-export or upscale before uploading. Low resolution is not just cosmetic: Meta's Andromeda delivery system (rolled out globally October 2025) uses resolution as a quality signal that affects auction competitiveness.

The most common mistake in AI video advertising is generating one or two ads and concluding that AI does or does not work based on that sample. Statistical significance requires enough creative variants and enough spend.

A practical 5-day creative test structure:

• Day 1: Upload 5 hook variants of the same core concept. Each variant differs only in the first 2 seconds. Use a separate ad set per creative with identical targeting and a $20 per day budget per ad set.
• Days 2 to 3: Let the ads run without changes. Do not pause low performers at 24 hours; you do not have enough data.
• Day 4: Identify the top 1 to 2 hooks by CTR and hook rate (the percentage of viewers who watch past the 2-second point). Pause the bottom 3.
• Day 5: Consolidate budget behind the top performers. Create 3 to 5 body copy variations of the winning hook for the next test cycle.

Metrics to track in order of priority: hook rate (first 2 seconds), video completion rate, CTR, cost per landing page view, and cost per purchase (or trial, or sign-up, depending on your goal). Hook rate and completion rate are leading indicators that reveal creative quality before you have enough purchase data to be statistically meaningful.