Sort By: Oldest is a free Chrome extension developed by Elements6007. It falls under the category of Browsers and is a subcategory of Add-ons & Tools. This extension allows users to sort YouTube channels' pages by the oldest videos.

With version 1.3.0, Sort By: Oldest introduced a loading animation that indicates the status of loaded videos. Users have the option to disable this feature in the extension settings. Additionally, versionexpanded the functionality of the extension to include sorting by oldest for YouTube shorts and livestreams.

Please note that Sort By: Oldest is soon to become obsolete as YouTube plans to reinstate the sort by oldest feature. This extension was created as a temporary solution and may not function exactly like the original feature. Nonetheless, the developer expresses gratitude to all users who have utilized this extension.