<p>This pilot implementation study examined the feasibility, acceptability, and appropriateness of a brief online risk assessment and video-delivered treatment engagement intervention for youth receiving mental health services, in comparison to a control condition. We also assessed the feasibility of the measurement model. This study used a mixed-methods design. Eighteen youth completed an online engagement survey to assess concerns related to their mental health services and then were randomized to the engagement (<i>n</i>=9) or personality control condition (<i>n</i>=9). Youth watched two brief videos (&lt;6 min total) that included messaging and youth testimonials relevant to their study condition. After watching, youth completed the engagement and other surveys. Youth also provided quantitative and open-ended feedback about the videos and study procedures. For each video, we calculated the proportion of viewing time (seconds watched/total duration). Feasibility of the measurement model and the intervention was evidenced by high survey completion rates and a high proportion of youth who watched some duration of the videos. Youth from both conditions found the videos acceptable and enjoyable. Compared with youth in the personality condition, youth in the engagement condition reported higher ratings of perceived helpfulness and appropriateness of the videos for youth starting mental health services and watched longer durations of the videos. Findings suggest that the engagement videos, personality videos as a control intervention, and measurement model are suitable for further investigation in a larger trial to test the effects of the online risk assessment and video-delivered engagement intervention.</p>