Accepted Video Formats on Stocktwits
This page outlines the video formats and technical specifications accepted when using the video upload tool to insert videos to your posts on Stocktwits. Following these guidelines ensures the best playback experience for viewers across iOS, Android, and Web.
- File Format: MP4, MOV, and WebM are accepted. MP4 is strongly recommended for the widest compatibility across iOS, Android, and Web.
- Video Codec: H.264 is required for reliable cross-platform playback.
- Audio Codec: AAC (AAC-LC preferred). Audio is optional. Videos without audio are accepted.
- Maximum File Size: 500 MB. Uploads exceeding this limit will be rejected.
- Maximum Duration: 5 minutes.
- Minimum Duration: 3 seconds. Videos shorter than this will be rejected.
- Frame Rate: Up to 60 fps accepted. 30 fps is recommended for standard uploads.
- Captions / Subtitles: Not yet supported
Aspect Ratios & Resolution
Stocktwits accepts any aspect ratio between 3:7 (portrait) and 7:3 (landscape).
- Accepted Ratio Range: 3:7 to 7:3. Uploads outside this range will be rejected.
- Minimum Resolution: 360px on the shortest side. Videos below this will be rejected.
- Maximum Resolution: No upper cap. The 500 MB file size limit naturally constrains resolution at the high end.
- Recommended Landscape: 1920 × 1080 px (16:9). Standard widescreen.
- Recommended Portrait: 1080 × 1920 px (9:16). Ideal for mobile-first content.
- Recommended Square: 1080 × 1080 px (1:1). Works well across all devices.
Common formats that fit within the accepted range: 16:9, 9:16, 1:1, 4:5, 4:3, 3:2, 2:1, 1:2, and mobile screen recordings from iPhone and Android devices.
Thumbnail / Cover Image
- A thumbnail is automatically generated from the first frame of the video.
- Custom thumbnail upload not supported at this time.
- The thumbnail is displayed in the feed while the video is loading or paused.
Upload Restrictions
The following content restrictions apply to all video uploads on Stocktwits, in addition to the technical specs above:
- Videos must comply with Stocktwits Community Guidelines and Terms of Service.
- Content must not include unlicensed copyrighted material (music, clips, etc.).
- Videos promoting financial fraud, or misleading market content are prohibited.
- Only one video attachment is supported per post at this time.
Tips for Best Quality
- Export as MP4 (H.264 + AAC) for the broadest compatibility across iOS, Android, and Web.
- Any aspect ratio between 3:7 and 7:3 is supported. iPhone and Android screen recordings are accepted without any conversion needed.
- Use a fixed frame rate (30 fps recommended). Variable frame rate exports can cause playback issues.
- Aim to keep the file well below the 500 MB cap — smaller files upload faster on mobile networks.