Submagic
AI Video Captions
Submagic is an AI video editor focused on shorts, Reels, TikTok, YouTube Shorts and fast social media content. It adds styled captions, finds strong moments with Magic Clips, cuts silences, inserts B-roll, applies zooms, transitions, music, sound effects, translations, AI avatars and scheduled publishing. In a Spybox workflow, Submagic mainly helps turn raw footage, a podcast, an interview, UGC or a product demo into several testable short-form formats.
What is it for?
- Create readable animated captions for vertical videos where much of the attention happens without sound or with quick reading.
- Turn a long video or raw footage into short clips with cuts, subtitles, B-roll, auto-zoom, silence removal, transitions, sound effects and music.
- Prepare variants for TikTok, Reels, Shorts, LinkedIn or social ad campaigns, with translation and style adaptation when several markets are targeted.
What to check
Submagic speeds up editing, but automatic captions and cuts still need review: one wrong word, tone or context can change the message.
- Review transcription, spelling, brand names, numbers, product claims, implied meaning and translation before publishing.
- Check rights for source video, voice, face, music, effects, B-roll, images, GIFs, logos, testimonials and imported elements.
- Review pacing, mobile readability, caption placement, contrast, hook length, export format, file size and TikTok/Meta/YouTube rules.
How to use it when deciding
- Start from a Spybox angle, choose source footage or a long segment, then let Submagic suggest captions, cuts and strong moments.
- Create a few clear versions: caption style, hook title, B-roll, zoom, music, language and format, without mixing too many hypotheses in one video.
- Compare watch time, retention, clicks, comments and cost per result before deciding whether the angle deserves more polished production.