YouTube Advertising is video-based paid advertising served through Google Ads (since YouTube is owned by Google). Ads appear before, during, or after YouTube videos, or as Discovery ads in YouTube search results. YouTube reaches over 50 million UK users monthly — the majority of UK adults. The most common formats are skippable in-stream ads (users can skip after 5 seconds) and non-skippable in-stream ads (15-30 seconds, must be watched in full). YouTube advertising is charged on a CPV (cost-per-view) or CPM basis rather than CPC.
YouTube advertising occupies a unique position in the paid media landscape — it combines the mass reach of traditional broadcast television with the targeting precision of digital advertising. A UK car brand can run video ads targeting UK users who have searched for car reviews, visited competitor websites, or whose demographics match their ideal buyer profile — capabilities impossible with traditional TV advertising.
YouTube ad formats
- Skippable In-Stream — plays before or during YouTube videos; user can skip after 5 seconds; only pay for views over 30 seconds or full view if shorter
- Non-Skippable In-Stream — 15-30 second ads that must be watched in full; higher completion rate; charged per impression (CPM)
- Bumper Ads — 6-second non-skippable ads; ideal for brand awareness and frequency building
- In-Feed Video Ads (Discovery) — appear in YouTube search results and the Home feed; pay per click on the thumbnail
- Outstream Ads — video ads on Google's partner websites and apps; viewable format charged on CPM
- Masthead Ads — premium homepage placement; sold on reservation basis; very high reach but high minimum cost
Bumper ads (6-second non-skippable) are the most cost-efficient YouTube format for brand awareness and frequency — they are viewed to completion by definition, have lower CPMs than longer formats, and fit within the attention span most users are willing to give. For more complex brand storytelling, 15-30 second non-skippable ads provide enough time for a complete message. The 30+ second skippable format is most effective when the content earns viewers' continued attention beyond the skip threshold — which requires high-quality, genuinely engaging creative.
YouTube ad performance metrics vary by objective. For awareness: view rate (% of served ads viewed past the 5-second skip threshold), completed view rate, and brand lift surveys (measuring aided awareness, message association, and purchase intent lift). For action: clicks, site visits, and conversions tracked through Google Ads conversion tracking and GA4. YouTube's brand lift measurement (available for campaigns meeting minimum spend thresholds) provides the most rigorous awareness measurement — A/B testing exposed vs unexposed users on awareness metrics.