How do I choose between different OTT content publishers for premium inventory and completion rates?

When choosing between OTT content publishers for premium inventory and completion rates, focus on a few practical criteria rather than just reach or brand name.

1) Define what “premium” means for your campaign

Premium can mean different things:

• Top-tier content adjacency: live sports, tentpole shows, major film libraries, news
• High-viewability / low-ad fraud environments
• Brand-safe, curated inventory
• Strong first-party audience data
• High completion video placements: short-form pre-roll, mid-roll in long-form, connected TV spots

2) Compare publishers on inventory quality

Ask each publisher:

• What share of inventory is direct-sold vs. resold?
• Is the inventory on owned-and-operated apps/devices or syndicated?
• Do they offer CTV, mobile OTT, desktop, or all three?
• Can they provide content-level transparency?
• What is the ad load per hour and per title?

Higher-quality OTT publishers usually have:

• Lower ad clutter
• Better content-to-ad ratio
• Better controls over where ads appear
• Stronger demand consistency

3) Evaluate completion rates by format and environment

Completion rate is heavily influenced by placement and device. Look at:

• Device mix: CTV often outperforms mobile/desktop for completion
• Ad length: 15s ads usually complete better than 30s
• Placement: pre-roll often completes better than mid-roll
• Content type: lean-forward entertainment and live sports can behave differently
• Frequency: too much frequency can lower completion and engagement

Ask for:

• Historical VCR/AVOC/CTR by placement
• Completion rates by device, app, content genre, and ad length
• Whether completions are measured as quartile completion or full completion

4) Look at audience relevance, not just scale

A smaller publisher with the right audience may outperform a larger one. Check:

• Audience demographics
• Household/geo targeting
• Interest segments
• Content context alignment with your brand

If the audience is highly relevant, you may get:

• Higher attention
• Better completion rates
• Better post-exposure outcomes

5) Ask for transparent reporting

You’ll want reporting that breaks down:

• Impressions served
• Viewability or screen exposure
• Completion rate
• Invalid traffic/fraud filtering
• Content/title/app-level performance
• Device and environment splits

If a publisher can’t give you transparent reporting, it’s harder to judge quality.

6) Test publishers side by side

The best way to choose is through a controlled test. Run:

• Same creative
• Same dates and budget level
• Same audience target
• Similar placements and ad lengths

Compare:

• Completion rate
• Cost per completed view
• Reach
• Frequency
• Brand lift or downstream KPIs if available

7) Weight premium inventory vs. completion based on goal

If your goal is:

• Brand awareness: prioritize premium content environment and reach
• Video message delivery: prioritize completion rate and low ad clutter
• Performance: prioritize audience fit, completion, and downstream actions
• Launch/brand prestige: prioritize high-profile publishers and content adjacency

8) Practical selection framework

Score each OTT publisher on:

• Inventory quality: 30%
• Completion rate: 25%
• Audience match: 20%
• Transparency/reporting: 10%
• Cost efficiency: 10%
• Brand safety/fraud controls: 5%

Then choose the one with the best total score for your objective.

If you want, I can also give you:

1. a publisher comparison scorecard template, or
2. a list of questions to ask OTT publishers before buying.