Ruffle, an Adobe Flash Player emulator written in Rust, has added support for the H.263 video compression format decoder, which allows you to play video streams embedded in swf files (without support for the flv format yet). The H.263 decoder is written from scratch in Rust and is not a wrapper around FFmpeg. The implementation of the codec was initially proposed for inclusion in Ruffle back in January, but was not accepted for a long time due to an analysis of the risks associated with patent claims. The implementation of the new open H.263 codec is published in the form of a separate project, h263-rs, which can be used not only in Ruffle. The code is provided under the MIT and Apache 2.0 licenses.
Source: opennet.ru