The terms lossy and lossless are used multiple times in this page. Lossy means that video files compressed using that format will lose some of their image fidelity to save space. Lossless means that the compression will not sacrifice iimage fidelity, no matter how much you compress the video file with that format.
The following licenses are suitable for video files:
Older licenses like CC BY-SA 3.0, CC BY-SA 2.5, and CC BY-SA 3.0, CC BY-SA 2.5 are fairly acceptable for importing existing media. Many of our older media use such licenses, but please not use those older licenses for brand new content when you have full power to use latest version of those licenses. If you can get permission from original author to get a newer or more permissive license, please get it. For Creative Commons licenses older than 3.0, please ask us before merging.
See the page Licenses/Media for details.
- RoQ — a lossless compressed format from legacy id Tech engines.
- OGM — a lossy compressed format muxing Theora video with Vorbis audio in an OGM container (OGG derivative).
The Theora codec was broken and considered unsafe and then removed. OGM itself was questionable as the OGG container would have been expected instead.
- AVI — a container used with MJPEG lossy compressed format.