I feel healthy when I get to cry and laugh at least once a day. The worst period of my life was when I couldn't cry for years. Anyway, so I often watch movies that make me cry, and can't even count them. Recently, I don't watch almost any movies, that are not documentaries, though. Kinda got fed up with all the fiction stories in movies and books. Crying is not necessarily from sadness. More like, overwhelming feeling. For example, extreme beauty. My senses about the world are very musical, vibrant, so often at the core of the effect is some soundtrack. When combined with the right situation, it could be very powerful. But I guess you don't need such types of examples, maybe they won't affect other people the same way. So here are some very popular ones, from the top of my head:
[youtube]M3aKFrsapjc[/youtube] [youtube]jsecIgxWQJA[/youtube]
[youtube]Pzj_f3Iw6NI[/youtube] [youtube]ICNRRDJEQiQ[/youtube]
P.S. I feel much stronger now, because I'm able to cry, compared to the period when I couldn't. Crying is like a regenerating force, similar to sleeping and drinking water. I actually can't cry when I'm very sad. When I cry I'm much more alive, and emotional, and decisive/powerful/creative.