YouTube: SBD — Zagrom

YouTube recently removed the ability to sort search results by date. I saw someone post the URL address bar codes YouTube used for 'sort by date' and 'sort by past hour' sorting; the buttons on YouTube filters are gone but the codes for it still work.

Here they are if anyone else needs them; when searching just paste these to the end of the address, which is all this extension does for easy use:
Sort By Date: &sp=CAI%253D
Sort By Past Hour: &sp=EgIIAQ%253D%253D

There are two ways to use this plugin. By default it will add two new buttons next to the 'filter' button on a YouTube search result (see image). As a fallback in case YouTube changes now the site loads the page, the pinned extension provides buttons as well by clicking icon in the extension in the top bar. There are settings to disable either of the buttons (sort by time or by hour) if you only need one or the other.