Since the PR "Do not use third-party cookies in embedded videos #5548", the logic from "embed_videos_helper" was extracted to the "embedded_video_component" and the "videoable" model concern. However, during this refactor, the "regex" method, which uses record.class:: to handle video embeds, was left inaccessible for Legislation Proposals. This commit fixes the issue by including the concern in the Legislation Proposal model.