This video discusses the idea that religious people are happier.
- any sources that support or contradict the claims?
- any scientific papers that address the issue?
It depends on where you look. And exactly as people have said, what defines hapiness.
According to some studies, religious people tend to be happier.
But then you look at overall country happiness, and very secular, irreligious nations like the Scandinavian nations are rated as the happiest.
I think it is safe to say that religiousness may not be the main factor in determining happiness, rather other factors, and the correlation is incidental. People searching for a specific correlation and causation will find what they are looking for. In general, a cum hoc ergo propter hoc fallacy at work in both cases.
For instance, in the religious community, there is a ready made support structure in place for religious people.
This may be a bigger contributor to happiness than religion or no-religion.
Yes, according to this study and this book (see chapter 16), religiosity correlates with happiness, though it may be religious attendance and not religious belief that really matters (Chida et al. 2009).
There are many factors that correlate with happiness, and there are effective methods to become happier - religious or not. For more info, and a ton of references, read How to Be Happy (free online).