Vidulk is an AI-powered mobile app for iOS and Android that turns long videos and audio into viral short-form clips. It also includes an AI image studio and professional caption editor.

How does AI clip detection work?

Import a video or paste a link — Vidulk transcribes the audio using AI speech recognition that supports 99 languages, then analyzes the transcript to find the most engaging moments. Each clip is scored by virality potential and categorized as Insight, Story, Funny, Tactical, Controversial, or Emotional.

What languages does Vidulk support?

Vidulk supports speech recognition in 99 languages including English, Spanish, French, German, Korean, Japanese, Chinese, Arabic, Hindi, Portuguese, and many more. The app interface is available in over 30 languages. Language is detected automatically.

What caption and editing features are available?

Vidulk includes 7 caption styles (Highlight, Karaoke, Typewriter, Minimal, Bold Pop, Gradient, and more), customizable fonts, colors, and animations. Export in multiple aspect ratios (9:16 for Shorts/Reels, 1:1 Square, 4:5 Portrait, 16:9 Landscape) at up to 4K resolution.

What is the AI Image Studio?

AI Studio lets you generate thumbnails and images from text prompts with 6 artistic styles including Realistic, Illustrated, Abstract, Minimalist, Anime, and Watercolor. It also includes an Image Enhancer that upscales images 2x or 4x. All processing happens on-device for privacy.

What content types does Vidulk work with?

Vidulk is optimized for podcasts, YouTube videos, interviews, lectures, gaming highlights, vlogs, music, sports, and news content. Import from YouTube, TikTok, Instagram, Twitter/X, Facebook, or upload directly from your camera roll.

Does Vidulk work with long videos?

Yes. Vidulk handles videos of any length. Short videos are processed on-device, while longer videos (over 5 minutes) are processed using server-side AI for faster and more reliable results.

What platforms is Vidulk available on?

Vidulk is available on both iOS (App Store) and Android (Google Play Store). The app interface is available in over 30 languages.

Yes. Video transcription and AI image processing happen on-device. Your videos are not stored on external servers permanently. You can delete your account and all data at any time from the app settings.

Can I use Vidulk for audio-only content like podcasts?

Yes. Vidulk fully supports audio-only content. Import MP3, M4A, WAV, or other audio files. AI detects the best moments and you can add AI-generated background images or choose from 1,200+ built-in backgrounds to create video clips from audio.

Can Vidulk remove captions or subtitles from videos?

Yes. Vidulk includes AI-powered caption removal that automatically detects and removes burned-in captions and subtitles from your videos before clipping. It works best with dynamic/moving captions like those on TikTok, Reels, and YouTube. Enable it with a simple checkbox when importing your video. Processing takes 7-20 minutes and uses additional credits based on video length.

How do I export clips from Vidulk?

After editing, choose your aspect ratio (9:16, 1:1, 4:5, or 16:9), resolution (720p, 1080p, or 4K), and export. Clips are saved directly to your Photos library and can be shared instantly to any platform.

How to Turn Twitch Streams or VODs into YouTube Shorts Clips

To create YouTube Shorts from Twitch streams or VODs, you need to extract, reframe, and caption vertical clips that meet YouTube's Shorts specs. Vidulk’s AI clipper automates this workflow for you.

Twitch Stream / VOD to YouTube Shorts Clips: How-To Guide

Step 1: Download Your Twitch VOD or Stream Recording

Twitch does not offer native vertical exports. Download your past broadcast (VOD) from Twitch or record your stream locally using OBS. Make sure your file is in a standard format (like MP4) to ensure compatibility with editing tools.

Step 2: Understand YouTube Shorts Requirements

Maximum length: 3 minutes
Aspect ratio: Vertical (9:16) or square (1:1)
Resolution: 1080x1920 for 9:16
Captions: YouTube auto-generates them, but adding your own improves accessibility and engagement

Step 3: Reframe and Clip for Vertical Viewing

Twitch streams are usually 16:9, so vertical reframing is essential. A popular layout is splitting the video to show both face-cam and gameplay. Manual editing requires cropping and rearranging in video software, but this can be time-consuming and complex for non-editors.

Step 4: Automate with Vidulk’s AI Clipper

Vidulk’s free app (iOS & Android) streamlines the process. Paste your Twitch VOD or stream recording into Vidulk, and the AI finds the most engaging moments. It automatically converts them into vertical (9:16) clips, adds captions, and sizes them according to YouTube Shorts specs. You can review and export ready-to-upload clips, saving hours of manual work.

Step 5: Upload to YouTube Shorts

Sign in to YouTube Studio
Upload your vertical, captioned clip (up to 3 minutes)
Ensure the aspect ratio and resolution meet Shorts requirements
YouTube will classify it as a Short if specs are met

Vidulk's AI clipper (free to start, iOS + Android) finds the best moments in a long video and exports captioned vertical clips sized for the destination.

Try Vidulk

FAQ

How do I download my Twitch VOD for editing?

Go to your Twitch Creator Dashboard, select Content > Video Producer, find your VOD, and click Download. You can also record your stream locally with OBS.

What aspect ratio do YouTube Shorts require?

YouTube Shorts require a vertical (9:16) or square (1:1) aspect ratio. Anything wider, like 16:9, is treated as regular long-form video.

Does Vidulk automatically add captions to my clips?

Yes, Vidulk’s AI clipper generates captions for your selected clips, making them accessible and engaging for YouTube Shorts.

Can I edit the clips Vidulk creates before uploading to YouTube?

You can review, trim, and export the clips Vidulk generates. For further editing or fine-tuning, use your preferred video editor before uploading.

What is the maximum length for a YouTube Short?

As of August 2026, YouTube Shorts can be up to 3 minutes long. Make sure your vertical clip does not exceed this duration.