I would argue that psychological studies follow the usual scientific method (formulating hypotheses, conducting systematic research, collecting and analyzing data, and drawing evidence-based conclusions) and that clinical psychology relies on empirical research and evidence to develop and refine therapeutic approaches.
But to your point.
While it may seem self-evident that singing with others can be uplifting and fulfilling, scientific studies and research can offer a more nuanced and comprehensive understanding of why this is the case. They help us uncover the underlying psychological mechanisms and provide empirical evidence of the benefits.
I'm glad to hear that you enjoyed the singing video.
Cheers!