Osmosis video downloader
Tentek finds the video on a Osmosis page and saves it to your computer. One click, no converter sites, no watermarks.
Free. No sign-up. No third-party sites.
Found on this page
osmosis.org
MP4 · lecture
DownloadUI mock · the real UI lives in the extension
What you can save
Formats and quality
- MP4 · lecture
Notes and limits
A medical education platform. Lectures can be saved for offline study — your account must already have access to the material. Private content requires being signed in on the site — the extension only sees what your browser already has access to.
This is not a YouTube downloader. Only download what the site rules and the law allow.
How to download
Open a video on Osmosis
Any page on osmosis.org that plays a video.
Click the Tentek icon
The extension lists every file it detected on the page.
Pick quality and download
The file is saved straight to your computer.
If something went wrong
The extension finds no video
Hit play and let the clip run for a couple of seconds. Until the player starts fetching the file there is nothing on the page to save. Still nothing? Reload the page once and try again.
A video behind a login is not detected
Sign in on the site. The extension sees exactly what your browser can reach, and it does not work around access limits.
The file came out silent
That means only the video track was taken. Pick the entry marked video+audio and the picture and sound are muxed into one file. On the free tier these downloads are rate-limited: the muxing happens on your machine and costs resources.
Why Vimeo downloads come out with no sound →FAQ
Is it free to download Osmosis videos?
Yes. Single downloads in standard quality are free forever. Premium adds batch downloads, maximum quality and download history.
Which Osmosis domains are supported?
osmosis.org.
Do I need an account to download from Osmosis?
Private content requires being signed in on the site — the extension only sees what your browser already has access to.
What formats and quality do I get?
MP4 · lecture. A medical education platform. Lectures can be saved for offline study — your account must already have access to the material.
Does it work with YouTube?
No. YouTube is not supported due to Chrome Web Store policy.
Where does my data go?
The extension runs in your browser and saves files to your computer. Details are on the privacy page.
Save your first Osmosis video in a minute
Free on the Chrome Web Store. No sign-up.