The outlier multiple on every YouTube video, computed against its own channel's normal, and one-press thumbnail download. Free.
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Version
0.1.7
updated 13 Oct 2026
About PreFilm - Growth Tool for YouTube
PreFilm is a YouTube growth tool for business owners who post to win customers, not just views.
The extension marks every long-form video on YouTube with how it performed against its own channel's normal: a red 13.3x badge on the thumbnail means that video got 13.3 times the views its channel usually gets. That is how you spot the outliers in and around your niche at a glance, before they have been copied to death.
On a channel's Videos tab the numbers are worked out from the page itself. Elsewhere they come from PreFilm's research cache, and on a channel PreFilm does not know yet, press Check and your own browser reads that channel's page. Hover any badge for the numbers it rests on, download the thumbnail, or open the video in PreFilm.
PreFilm customers get three more actions in the same card: save the video to their research, read what offer the video pushes, and copy the transcript. In the PreFilm app, the outliers you save become titles, scripts and packaging tailored to your channel from your own past twenty videos, so the time you put into YouTube comes back as customers.
The overlay is free for everyone.