The 1.0 version of Tubular for Mac was provided as a free download on our website. The application is included in Internet & Network Tools. This Mac application was originally developed by Twisted Ninja Software.
From the developer:
Tubular is an Internet TV application for your Mac which makes it simple to watch videos on YouTube. With an elegant and familiar interface, it’s how Internet TV on the Mac should look. Convert any video to your iPod with one click. Quickly import your existing favorites from your YouTube account. And everything is designed to be dead simple.
You may want to check out more software for Mac, such as Mindful Mynah, which might be related to Tubular.