Images, video & audio

Pictures, video, and audio bring your school to life. You can add a cover image to an article, drop photos and clips into the body where the words explain them, or publish a video or audio recording as its own item — same shelves as articles and terms, browsable from Explore.

Two ways to use video and audio

Video and audio show up in C3NTR in two places:

• Inline in an article — a clip dropped into the body, between paragraphs, right where the words explain it. Useful when the recording is part of a wider write-up.
• As its own item — a video or audio recording with its own title, description, cover image, tags, and grade. It lives on the Videos or Audio landing in Explore, can be hearted to your Library, and shows a runtime and view count just like an article.

Standalone images aren't an item type — a single photo on its own is a fragment, not a piece of content, so the Explore landings only cover Articles, Terms, Videos, and Audio.

Cover image

Every article can have a cover image that appears at the top. It sets the tone before the reader sees a single word.

To add or change a cover image:

Focal point editor

After choosing an image, a focal point editor appears. Pinch to zoom, drag to reposition, and choose a crop ratio. Fixed ratios like 16:9 and 4:3 are available, or you can use freeform crop for full control.

The focal point is saved with the article, so the image always looks right on different screen sizes.

Inline images

You can insert images within the article body using the toolbar image button or the /image slash command. These appear inline between paragraphs, right where your readers will see them.

Add a standalone video or audio item

To publish a video or audio recording on its own:

Standalone items show up on the Videos or Audio landing in Explore alongside the rest of your school's content. Each one has its own view count, can be hearted into the Library, and (for video) plays in a full-screen player when tapped.

Inline video in an article

Inside an article, tap the video icon in the editor toolbar to open the picker. It has two tabs:

• Recent — videos you've already uploaded to this school. Tap a thumbnail to drop it straight in.
• Add — bring in a new clip. Two source buttons: Photos picks from your camera roll; Files picks an MP4, MOV, or WebM from anywhere on your device.

Once chosen, the video uploads in the background and drops into the article right where your cursor is, with a poster frame and the duration shown on top. While editing, tapping the embed opens its action bar — Switch or Remove — rather than playing it, so a stray tap never starts playback; a long-press opens the same options. In the published article, tapping the embed plays it full-screen.

For a typical pick from camera roll: MP4 plays everywhere; MOV (HEVC) records natively on iPhone but a few older Android devices may not be able to play it back — use MP4 if you want maximum compatibility.

You can still drop in YouTube and Vimeo links via the article's Settings sheet — those continue to render as a card below the article body.

Inline audio in an article

Audio is great for pronunciations, breath rhythms, count-alongs, or short demos — anything best heard rather than read.

Tap the audio icon in the editor toolbar (the equaliser glyph) to open the picker. It has two tabs:

• Recent — audio files you've already uploaded.
• Add — pick an MP3, M4A, AAC, or WAV from your device via the Files button.

The clip drops into the article as a compact player with play/pause, scrubbing, and a remaining-time countdown. Each player is independent, so a long article can have several without them fighting each other.

Full-screen video player

In the published article — or on a standalone video item — tap the video to open the full-screen player. It has the controls you'd expect:

• Top bar — close button and the video title.
• Centre cluster — back 10 seconds, play/pause, forward 10 seconds.
• Bottom scrubber — drag to seek, with the current position and full duration on either side.

Tap once anywhere on the video to toggle the controls. They auto-hide three seconds after you start playback so the picture isn't covered.

Media Library

Every image, video, and audio file you upload is kept in your school's shared Media library — open it from the user menu, or in Settings > Media Library. From there you can browse by type, find where each file is used, replace a file across every article at once, and delete files to free up space. See Media library for the full guide.

Storage

Images, videos, and audio all count toward your school's storage quota:

• Seed — 500 MB
• School — 5 GB
• Academy — 10 GB

There's no per-file size limit on any tier — a single recording can use as much of your quota as you want, so a long demo or a high-quality video is fine. You can check usage at any time in Settings > Storage & Cache.

Stock photos & video

C3NTR includes a built-in Stock tab — a large library of free, high-quality photos and video clips from Pexels — in both the image and video pickers. When you pick a stock item, it is downloaded into your school's Media Library and the photographer credit is recorded automatically, so attribution ("Photo by … on Pexels" / "Video by … on Pexels") always travels with the media.