Table 1

Measures used in each stage of the trial

	Measure	Example items	Scoring	Baseline	Postviewing	Follow-up
Primary outcome
Likelihood of seeking help	General Help Seeking Questionnaire (GHSQ-Self)	If you were having a personal or emotional problem, how likely is it that you would seek help from the following people or services? Including: intimate partner, friend or doctor. Plus three purpose-designed responses: online health chat rooms, online searches for health information and social media	10 items. 1 (extremely unlikely) to 7 (extremely likely). Total score used for analysis	✓		✓
Secondary outcomes
Likelihood of recommending a male or female friend seek help	General Help Seeking Questionnaire-Modified. (GHSQ-male friend, GHSQ-female friend)	How likely is it that you would recommend a male/female friend seek help from the following people or services?	10 items. 1 (extremely unlikely) to 7 (extremely likely). Total score used for analysis	✓		✓
Conformity to masculine norms	Conformity to Masculine Norms Inventory 22	My work is the most important part of my life. I like to talk about my feelings.	22 items. 0 (strongly disagree) to 3 (strongly agree). Total score used for analysis.	✓		✓
Experience of masculinity	Gender Role Conflict Scale-Short Form	Affection with other men makes me feel tense. My work or school often disrupts other parts of my life.	16 items. 1 (strongly disagree) to 6 (strongly agree). Total score used for analysis.	✓		✓
Social support	MOS Social Support Survey 100	How often is each of the following kinds of support available to you?’ Including: Someone to give you good advice in a crisis. Someone who shows you love and affection.	19 items. 1 (none of the time) to 5 (all of the time). Total score was transformed to a 0–100 scale for analysis.	✓		✓
Psychological distress	Kessler-10 scale	In the last 30 days: , About how often did you feel nervous? About how often did you feel worthless?	10 items. 1 (none of the time) to 5 (all of the time). Total score used for analysis.	✓		✓
Well-being	Personal Well-Being Index-Adult	How satisfied are you with…living, health, achieving in life, relationships, safety, community connectedness and future security.	7 items. 0 (no satisfaction at all) to 10 (completely satisfied). Total score was averaged to yield a score out of 100	✓		✓
Resilience	Connor Davidson Resilience Scale 10	I am able to adapt when changes occur. Under pressure, I stay focused and think clearly.	10 items. 0 (not true at all) to 4 (true nearly all the time). Total score used for analysis.	✓		✓
Suicidality	Adult Suicide Ideation Questionnaire	I thought it be better if I was not alive. I thought about the ways people kill themselves.	25 items. 0 (I never had this thought) to 2 (almost every day). Total score was used for analysis.	✓		✓
Purpose designed
Demographics	Purpose designed demographic questions	Age, gender, postcode, country of birth, language spoken, Aboriginal or Torres Strait Islander origin, sexual orientation, marital status, education, employment status.	11 items. Individually analysed.	✓
Content knowledge of the documentary	Purpose designed test questions	In Episode 1, which workplace did Gus visit? (intervention). In Episode 1, which city did they visit? (control).	six multiple-choice items. Individually analysed.		✓
Immediate impressions postviewing	Purpose designed postviewing questions	How much did you enjoy the documentary? Do you think the documentary will have a positive (or negative) impact on men?	13 closed and open ended items. Individually analysed.		✓
Impact at follow-up	Purpose designed follow-up questions	Do you think the documentary will have a positive (or negative) impact on men? Did the documentary trigger any changes for the better (or worse) in you? Did you change your attitudes or behaviours in any of the following ways?	18 closed and open-ended items. Individually analysed.			✓