Introduction
The COVID-19 pandemic has significantly impacted mental health, particularly among frontline professionals. In response to the associated social isolation, short-term and remote service alternatives became essential. This study aimed to investigate the predictors of perceived improvement following the single session intervention with enhanced psychoeducation (SSI-EP), which included support videos, for frontline professionals during the COVID-19 pandemic.

Methods
This study analyzed data from a large trial involving frontline workers conducted from April 2020 to December 2021. All participants were randomized to receive the SSI-EP with videos and were included in the analysis.

Results
The final sample included 709 participants – 82.8 % health‑care professionals and 87.8 % women. One month after the intervention, 558 individuals (78.7 %) showed improved emotional symptoms. Greater improvement was associated with viewing more intervention videos and self-medication. In contrast, excessive carbohydrate and fat intake was linked to poorer outcomes.

Conclusion
This study underscores the significance of the SSI and the role of psychoeducational videos in enhancing participants’ perceptions of improvement. Further research is necessary to examine these elements and determine which individuals might gain from this cost-effective, scalable intervention.