YouTube Video Repurpose
Automatically turn long YouTube videos into short clips for every platform
MarbSocial automatically adapts long YouTube videos to short-clip formats for TikTok, Instagram Reels, YouTube Shorts, VK Clips, and Telegram. One YouTube video → 5 ready clips with captions, AI-picked moments, and correct 9:16 format. All cropping modes supported: hard center crop, letterbox (full video with black bars — Reels-repost style), and manual frame offset. Saves hours of editing every week.
What it does
Auto YouTube download → S3 via yt-dlp with bot-detection bypass
AI finds 5 most viral moments and cuts them into 15-60s clips
"Letterbox" 9:16 — full frame visible, Reels-repost style
Crop 9:16 with manual X-offset (speaker on left/right)
4-word subtitle chunks with transitions (TikTok/Reels style)
Manual subtitle position editor (X/Y offset, font scale)
Export to MP4 1080×1920 — publish directly via MarbSocial
Clip library — reuse, share via link
FAQ
What's the difference between "crop" and "letterbox"?
Crop takes a vertical slice from 16:9, loses left/right (works when speaker is centered). Letterbox shows full video with black bars top/bottom (classic Reels-repost-from-YouTube style).
Can I submit a private video?
Requires cookies from an authenticated YouTube session on the server. Admin uploads via /admin/cookies. Without cookies, only public videos work.
What's the max source video length?
Up to 2h on Professional, 4h on Advanced. Standard capped at 30 min. Clips are 15-60s each.
Is TikTok supported as a source?
Yes. Besides YouTube — TikTok (long and short), Instagram Reels/posts, Vimeo, Twitch clips. Direct link only.
See also
Start for free
Standard plan — 3 accounts, 100 posts/month. No credit card required.
Repurpose your first video free