wellinformedyid, about the cancer video and not shouting at everyone to donate: i actually had a story at the kotel once where a girl was collecting for camp simcha or s/t like that, and i passed her saying hatzlacha but didn’t give her any money. she comes up behind me and said – don’t you care for the kids with cancer??
i just walked off, but i almost went back and said to her – you have no idea how much i care for kids with cancer. but you know what? if i had any money, i’d donate it to my parents who are both sick and cannot afford medication either!
my point is: not everyone can do everything. my part in helping kids with cancer may be having kavana during shemona esreh, refa’einu. and the like for everything else.