With Unreel's channel targeting you can choose to enable ads on a specific channel and set the way those ads are delivered.
Part 1: Accessing Channel Targeting
From the admin dashboard select 'content' and from the drop down select 'channels.'
From the channels section, select the gear icon next to the channel you would like to enable ads.
Part 2: Enabling and editing channel targeted ads
From the 'channels detail' page scroll down to the section titled 'Channel Ads.'
Check enable to enable ads on that channel.
Adjust the 'frequency' section to set how many videos a user sees before they are served an ad.
Adjust the 'Offset' section to set how many ads play around a video, and when they play.
To enable a pre-roll ad, leave the 'offset' counter at 0.
To enable a mid-roll ad, set the counter forward to the time in the video you would like the ad to show.
To enable additional ads on a single video select the '+' button.
If you want multiple pre-roll ads, set the first number to 0, and each additional number .01 seconds forward.
Select the platforms you want to serve ads on by selecting the box next to the platform. From the drop down select the ad source. In the ID - just enter the "iu" value in the VAST tag.