Resources & media

Media in Lurno is added from inside the block that uses it. There is no separate media browser to visit first: you add an Image, Video, Audio, or Document block to a lesson, and the block itself gives you a picker with Upload, Link, and — for images — Stock tabs. Everything you pick that way is registered in your organization’s media catalogue behind the scenes.

What this does

Every image, video, audio file, and document you attach is stored against an organization and referenced by the block that uses it. The organization is taken from whatever you are editing — the program that owns the lesson, or the collection you are working in — not from the sidebar switcher. So a file uploaded into one organization’s program isn’t reachable from another’s.

Before you start

Have the file ready, or have a public URL for it if the asset lives elsewhere.
For accessibility, prepare a short description for each image. Alt text is a plain-language description of what the image shows, read aloud by screen readers and displayed if the image fails to load (“Bar chart of quarterly sales”, not “image1.png”).

Add an image

In a lesson, add an Image block — from the Add panel’s Media group, or by typing / and choosing Image.
Choose Add image on the empty block. A picker opens with three tabs:
- Upload — Choose file picks a file from your device. The block shows real upload progress as a percentage, with Cancel if you change your mind, and Try again if the upload fails partway.
- Link — paste a Public URL and choose Save link. Lurno records the link in your media catalogue so it can be reused; the file itself stays where it is.
- Stock — pick Unsplash, Pexels, or Pixabay from the dropdown, search, and click a photo. Photographer attribution is captured with it.
Once the image is in, two fields appear underneath it: “Add a caption (optional)” and a required description for screen readers (alt text). An image with no description carries a “Needs a description” chip, and publishing the lesson waits for it — see Publish. This applies to every picture, not just an Image block: a picture in a question’s prompt, in an answer option, or on a flashcard needs one too.
To swap the picture later, hover it and choose Replace.

Edits save when you leave the field — there is no separate save button.

Add video, audio, and documents

The same Upload / Link picker appears in every media block; only the accepted file types and the extra fields change.

Block	Accepts	Extra fields
Video	An uploaded video file, or a YouTube, Vimeo, or Loom link pasted into the Link tab — Lurno reads any of the three the same way. A link it can’t read says so inline rather than failing silently.	Captions (optional) — a `.vtt` or `.srt` file, with a captions-added indicator once attached — and Poster image (optional), which can itself be uploaded, linked, or picked from stock. No caption or alt-text field.
Audio	Any audio file	Transcript — optional free text, shown to learners as an expandable section
Document	PDF, Word, PowerPoint, Excel, CSV, TXT, RTF	Display mode: Download link, Preview, or Inline viewer
Image Carousel	Images	Several images, each with its own required alt text and optional caption, plus a layout choice (slider, grid, or side-by-side row)

Upload, video, and audio blocks all show real upload progress as a percentage while the file transfers, with Cancel to stop mid-upload and Try again if it fails.

Cover images

Program and module covers use a different, simpler control — a plain Upload cover drop area, with no Link or Stock tab and no alt-text field.

A program’s cover is set from the program’s Settings, in the basics section, and saves with the rest of that form.
A module’s cover is set from that module’s Settings, reached from the module’s ⋯ menu.
The accepted formats and limit are stated on the control itself: PNG, JPEG, or WebP, up to 4 MB. Wider images crop best.
Once a cover is set, the upload area is replaced by a preview of the image with a remove button in its corner. There is no in-place “replace” — remove the current cover first, then upload the new one.

Uploads are read, not just stored

A file you upload is read by Lurno, not only stored:

What you upload	What happens
An image	It’s described — alt text, a caption, and tags — so it’s accessible and searchable without you typing them
An audio file	It’s transcribed, and the transcript becomes part of what the file carries
A PDF, Word or PowerPoint file	It’s ingested into your searchable document library, under the same permissions as uploading it there directly
Video, spreadsheets, anything else	Stored as before. Nothing is read

This runs in the background after the upload reports success, so it never slows you down or blocks you — and if it fails, your file is still uploaded and usable.

Alt text you write yourself always wins. The description only fills a gap, it doesn’t overwrite your words. If an automatic description is wrong, edit it — your version stays.

Documents ingested this way are subject to the same permissions as the document library, so nothing becomes readable to somebody who couldn’t already read it.

Where media is served from

Images, video, audio and files are served from media.lurno.ai.

This matters in one situation: if your organization filters outbound traffic, or maintains a content-security or firewall allowlist for the sites your people can load, add media.lurno.ai. Without it, learners will see broken images and downloads that never start, while the rest of the product works normally.

Reference

Term	What it means
Upload	The file is stored in your organization’s media catalogue.
Link	Only the URL is recorded; the file stays at its source and will break if that source moves it.
Stock	A photo searched from Unsplash, Pexels, or Pixabay, recorded with its photographer attribution.
Alt text	A short written description of an image, used by screen readers. Optional but strongly recommended.
Caption	Visible text shown under an image.

Limits. Per-organization upload size caps and a storage quota exist, and video and audio uploads can be switched off per organization. None of that is self-serve — there is no screen for it. If an upload is rejected on size, or the video and audio options behave differently from what you expect, contact Lurno.

Troubleshooting

The upload is rejected. Each block only accepts its own kind of file — an Image block won’t take a PDF. Use the block type that matches, and check the file isn’t larger than your organization’s cap.

There’s no media library to browse. Correct — Lurno has no standalone media browser, even though the picker’s own wording (“stored in your org’s media library so you can reuse it later”) suggests one. The catalogue is real, but the only way to reach a file again is the block you added it to. To reuse a piece of content across lessons, author it in a collection and pull it in from the lesson editor’s From elsewhere entry in the Add panel.

A video link says it couldn’t be read. Lurno reads YouTube, Vimeo, and Loom links directly — check the link is public (not restricted to specific viewers) and points at a real video, not a channel or playlist page.

A linked image or video stopped working. The Link tab records only the URL. If the source moves or removes the file, the block breaks. Upload the file instead if you need it to be durable.

A replaced image still shows the old version. Refresh the page. The block points at the new file as soon as the picker closes.

You can’t find where to set alt text. The alt-text field only appears once an image is actually in the block — it sits under the caption field.

A stock photo search returns nothing. Stock search runs against the provider’s API. Try a different provider from the dropdown, or a broader search term.