Having long been on the horizon, Google has launched YouTube-based video units for AdSense publishers, according to Google's AdSense blog.

AdSense publishers have the ability to stock YouTube players with relevant video content — and ads — on their sites. They will also be able to define what videos appear on their sites, choosing either by type of video or by content provider.

Ads appear as both banners above the video, and as overlays that appear after the video has played for 10 seconds.

The look and feel of the players can also be customized. Revenue from the ads, reports Variety, will be split between Google, the publisher and the content provider.

Google has been displaying AdSense video ads for awhile now and has recently tried different ad formats for YouTube videos, but this is its first attempt at blending the two.