Creative — videos

Upload videos in Campaign Creator's creative step. MP4 / MOV / WebM, max 1 GB or 240 min on Meta. Aspect ratio matters per placement: 9:16 vertical for Stories/Reels/TikTok, 1:1 square for Feed, 16:9 landscape for YouTube. Captions strongly recommended — most users watch sound-off.

Who is this for

Mediabuyers + creative producers preparing video assets. Anyone wondering why their high-res 4K video upload is taking so long, or why their TikTok ad got rejected for aspect ratio.

The 3 most-common aspect ratios

Multi-aspect upload: provide 2-3 sizes per ad for full placement coverage.

Per-platform specs

Meta

TikTok

YouTube (via Google Video / Performance Max)

Snapchat

Taboola

Upload pipeline

When you upload a video:

1. Front-end: drag-and-drop OR click Upload OR pick from Creative Hub

2. Backend: file uploaded to Wevion storage

3. Async processing via SQS worker:

   • Validates format + duration + aspect

   • Extracts thumbnail (or uses your supplied thumbnail)

   • Normalizes to platform-compatible encoding (H.264 video + AAC audio)

   • Generates derived assets (different resolutions if needed)

4. Once processed: video ready in Creative Hub + Campaign Creator

Processing time: typically 30 sec - 5 min depending on size + format.

Captions

Critical: 80%+ of social video views happen with sound OFF (Facebook stat). Captions are essential:

Wevion accepts SRT files alongside video uploads.

Best practice: design video for both sound-on AND sound-off. Burn in key text + use SRT for accessibility.

Thumbnail

Each video has a thumbnail (the still image shown before play):

• Auto-extracted: Wevion picks frame at 1 second

• Manual selection: pick a different frame in Wevion's video preview

• Custom upload: provide a separate thumbnail image (same aspect ratio as video)

Custom thumbnails get 2-3x more clicks than auto-extracted. Worth the extra effort for high-spend campaigns.

Watermark policy

• Avoid heavy watermarks (e.g. TikTok watermark, "Posted on Snapchat" watermark)

• Meta/TikTok penalize cross-posted videos with competitor watermarks

• Use native + brand-clean video for each platform

Video length sweet spots

General rule: shorter video = higher completion rate. Test 15s vs 30s versions.

Upload paths

Direct upload

In Campaign Creator creative step → drag-and-drop OR click Upload. Goes to Creative Hub automatically.

From Creative Hub

Pre-upload videos to Hub (gs-117), then pick in Campaign Creator. Lets you tag, categorize, share across campaigns.

AI generation

Creative Hub → Generate → Video:

• Text prompt

• Pick style (cinematic, fast-paced, animated)

• Duration (5-30s typical)

• Output lands in Hub

• Uses AI Credits

Avatar (talking-head)

Creative Hub → Generate → Avatar:

• Text script

• Pick avatar (face, voice)

• Pick language

• Output: video of avatar speaking your script

• Useful for: UGC-style ads, multilingual without re-shooting

Voiceover (TTS)

Creative Hub → Generate → Voiceover (audio only, can be combined with image/video):

• Text script

• Pick voice + language

• Output: audio file

In Wevion's launchers

Express

• One video slot per ad

• Inline upload OR pick from Hub

• Live preview on right with placement toggle

Pro

• Per-ad video config

• Multi-aspect upload (provide 9:16 + 1:1 + 16:9 in one ad)

• Captions / SRT upload

• Thumbnail selector

Bulk Launch

• Per-row video reference (Hub asset ID)

• Bulk-upload videos to Hub first, then reference

Common issues

• "Aspect ratio rejected": TikTok requires strict 9:16; YouTube In-Stream requires 16:9. Re-crop or upload native.

• "File too large": compress (lower resolution, lower bitrate) OR split into shorter clip.

• "Processing stuck > 10 min": large file or queue backlog. Refresh in 10-20 min.

• "Captions don't appear": SRT must match video duration; timing must be valid; file must be uploaded with video, not separately.

• "Thumbnail shows wrong frame": pick a different frame in Wevion's preview OR upload custom thumbnail.

• "Video looks pixelated": source resolution too low for the target placement. Re-upload higher res.

• "Watermark visible — campaign rejected": TikTok-stored or Snap-stored videos have logos. Re-export from original source without watermark.

Best practices

Hook in first 3 seconds

• Most users scroll past in 3 sec

• Front-load value: what's in it for them

• Use motion + visual contrast to stop the thumb

Sound-off design

• Captions burned in

• Key info as visual text overlay

• Don't rely on voiceover alone

Brand visible early

• Logo or brand color in first 3 sec

• Aids brand recall even on short views

Pace matches platform

• TikTok: fast, dynamic, high-energy

• YouTube In-Stream: longer arc, story-driven

• Stories/Reels: snappy, native-feeling, vertical-first

Related

• Creative — images — image specs

• Use Creative Hub files in Campaign Creator — Hub integration

• Upload your first creative to Creative Hub — Hub basics