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In a context of developing peer-to-peer communication via social networks, formats such as video testimonials are increasingly used to communicate. Employer branding campaigns regularly use video testimonials featuring employees. The positive effects of such campaigns on candidates have been studied in the literature on employer branding. By contrast, there is little knowledge about how employees perceive video testimonials featuring their colleagues. This is an important question, as relay and support behaviors by current employees (known as employee advocacy) are key to strengthening the credibility of testimonials. Using a case study in a banking company, and drawing on social identity theory, this research shows that the intention to relay a video testimonial featuring colleagues is the result of a mechanism that involves the evaluation of congruence on four dimensions, as well as an anticipation of authentic self-enhancement. This research contributes to the work on employer branding, interpersonal influence, and social identity.