# License Information

This dataset contains videos under multiple open licenses. Each video's specific license is recorded in the `licenseurl` field of the metadata.

## Included Licenses

### Public Domain
Videos in the public domain have no known copyright restrictions and may be used freely for any purpose.

### CC0 (Creative Commons Zero)
https://creativecommons.org/publicdomain/zero/1.0/

The creator has waived all copyright and related rights. You can copy, modify, distribute, and perform the work, even for commercial purposes, without asking permission.

### CC BY (Creative Commons Attribution)
https://creativecommons.org/licenses/by/4.0/

You may share and adapt the material for any purpose, including commercially, as long as you give appropriate credit.

### CC BY-SA (Creative Commons Attribution-ShareAlike)
https://creativecommons.org/licenses/by-sa/4.0/

You may share and adapt the material for any purpose, including commercially, as long as you give appropriate credit and distribute your contributions under the same license.

## Excluded Licenses

This dataset explicitly **excludes** videos with Non-Commercial (NC) restrictions:
- CC BY-NC
- CC BY-NC-SA
- CC BY-NC-ND

## How to Check a Video's License

Each entry in `metadata.jsonl` includes:
- `licenseurl`: The full URL to the license
- `license_type`: A human-readable license name (e.g., "Public Domain", "CC BY")

## Attribution

When using CC BY or CC BY-SA licensed content, please provide attribution to the original creator as specified in the video's metadata.

For all content, we recommend acknowledging:
> Films courtesy of the Prelinger Archives, hosted by the Internet Archive.