Reach plc

Published Modified

  • Video
  • Video

Reach plc Pre-roll (MP4, site-served) ad specs

Reach plc Pre-roll (MP4, site-served) ads are 16:9 or 9:16 or 4:5 video clips, delivered as MP4. They run in the Reach websites · In-article video player (Primis) · Pre-roll placement on Reach plc. Encode with H.264 (AVC) video with AAC audio.

  • 16:9
  • 9:16
  • 4:5
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Visual

Aspect ratios
16:9, 9:16, 4:5
File types
MP4
Recommended size
1280 × 720 px

Video & audio

Video codec
H.264 (AVC)
Audio codec
AAC

Notes & source

  • Reach runs in-article video with Primis
  • This is the spec for a raw MP4 that Reach serves
  • Recommended: 6–15 seconds and up to 5 MB on mobile web, 15–30 seconds and up to 10 MB on desktop
  • Sound is off by default and only plays when the user turns it on, so use captions or on-screen text
  • Tracking is limited to 1×1 HTTPS image pixels with a [timestamp] cache-buster
  • JavaScript trackers do not run on MP4s
  • Skippable is off unless declared when booking in Google Ad Manager
  • Interactive features need a VAST/VPAID tag instead of an MP4
  • Effective 5 March 2026 (MP4 Guidelines v1.0)

Official source · checked not yet

Official source · checked not yet

Frequently asked questions

What aspect ratio does Reach plc Pre-roll (MP4, site-served) use?

Reach plc Pre-roll (MP4, site-served) supports 16:9, 9:16 and 4:5.

Which file formats does Reach plc Pre-roll (MP4, site-served) accept?

Reach plc Pre-roll (MP4, site-served) accepts MP4 files.

Related formats