In-Stream Video Specifications

Companion banners are optional and can be omitted from video ads. Please ensure that all pixels and tags are SSL compliant (https) — this does not apply to click-through URLs. Failure to provide secure tags and pixels may result in delivery issues.

Requirement	In-Stream Video	Companion Banner	YouTube & Skippable
Ad Length Available	Depends on inventory. Range :12–60 seconds. Must be less than or equal to duration (e.g., we can bid on a :30 impression with a :25 video).	N/A	:15 / :30 (non-skip, only on a subset of inventory) / :60 (must be skippable). Must be a minimum of :12 sec.
Video Placement	Pre-Roll (majority), Mid-Roll, Post-Roll	N/A	Pre-Roll (majority), Mid-Roll, Post-Roll
File Format	Hosted: .mp4 (H.264), .flv (FlashVideo), .webm, .mov, .wmv, .mpg, .mpeg — upload one file format, we encode into mp4, flv, and webm.	Hosted: .jpg, .gif, .png / Third-Party: served via VAST tag — see standard ad specs for more info.	Hosted: .mp4 (H.264), .flv (FlashVideo), .webm, .mov, .wmv, .mpg, .mpeg — upload one file format, we encode into mp4, flv, and webm. Third-Party: H.264 (MP4), FlashVideo, and WebM file types must all be included within each video creative. Other formats may be included but will not be used.
VAST/VPAID	Automatically managed for Third-Party: VAST 2.0 & 3.0, VPAID 1.0	Served via VAST tag	VAST 2.0+ only, must be secure. VAST-served video ads are not eligible to run on mobile web.
Video Aspect Ratio	16:9 (recommended), 4:3, 5:2	N/A	16:9 (recommended), 4:3
Max File Load Size	Hosted: no enforced limit	150k	10mb
Ad Format	16:9 (recommended): 1920x1080, 640x360, 400x225 / 4:3: 480x360, 400x300, 300x250, 300x60	Static images only, no Flash	16:9 (recommended): 1920x1080, 640x360 / 4:3: 480x360
Tracking Pixel	Hosted & Third-Party: Impression, Start, First Quartile, Mid-Point, Third Quartile, Complete, Click	Hosted: Impression, Click / Third-Party: N/A	Hosted & Third-Party: Impression, Start, First Quartile, Mid-Point, Third Quartile, Complete, Click
3rd Party Tracking Tags	Hosted: not limited / Third-Party: one third-party tracking URL. JS pixels not allowed.	N/A	Maximum of three third-party impression pixels allowed per third-party-served VAST XML. JS pixels not allowed.

All pixels and tags must be SSL compliant (https). This does not apply to click-through URLs. Major inventory sources require secure creative only.