Procedure
Demographic questions included age, gender (from the following: male, female, otherA series of visual analogue scales (VAS) were used to assess weight satisfaction, shape satisfaction, and muscularity satisfaction before and after viewing the stimulus. Only pre-video exposure data around weight satisfaction, shape satisfaction, and muscularity satisfaction were used in the current analysis solely for the purposes of examining confounding effects, as the focus of the current study is on engagement outcomes. Participants were asked to indicate how satisfied they feel right now, from 0 (Post-video weight satisfaction, shape satisfaction, and muscularity satisfaction are reported elsewhere. Other measures, including mental health literacy, and behavioural intentions, were assessed both pre- and post-exposure but are reported elsewhere [A set of 18 items measured on VAS was developed specifically for the current study to measure general engagement with the videos and topic. Items were informed by previous research examining responses to health campaigns [Eight VAS items identified from the factor analysis were used to measure participant interest (behavioural engagement) in the video and topic. Participants were asked to indicate their interest, from 0 (Five VAS items identified from the factor analysis were used to measure participant compassion towards people with body dissatisfaction, as well as self-compassion. These VAS items measured affective engagement. Participants were asked to indicate the degree to which the video was respectful, increased other-directed compassion, oversimplified body image issues (reverse scored), increased blame (reverse scored), and was perceived to make other people feel more concerned about their appearance (reverse scored), from 0 (Three items identified from the factor analysis were used to measure relevance of the video and topic, which reflected cognitive engagement. Participants were asked to indicate the degree to which the video was relevant to their own lives, covered an important topic, and they could recognise their own experiences in the video, from 0 (