YouTube Video Ads can be several different lengths. The most popular are 6 second bumper ads. Every other format should be at least 12 seconds in length and ideally no longer than 3 minutes.
Longer videos tend to not get viewed all the way through, so you should make sure the most important information is shown in the first 15 seconds. If video ads are 15 seconds or less, they will be running as non-skippable YouTube Ads.
Video ads can show on YouTube and on video partner sites and apps across the Google Display Network, including on tablets and mobile devices (depending on your format and settings).
YouTube Advertiser Stats
There are 1.9 billion active users on YouTube
Mobile Devices dominate YouTube viewership, but Television is gaining momentum
73% of adults in the U.S. use YouTube
Each visitor spends 11:24 seconds on YouTube each day
Retarget your competitor’s web traffic by serving ads on
Youtube to users that recently visit their site
Utilize keyword phrases in your targeting to serve ads to
to people that recently searched for those terms
Utilize discovery ads, recommended videos that pop up
on the YouTube homepage, as a releted video on the
search result page