Has no one considered the fact that if the "government" was spraying us with chemicals that they'd also be spraying themselves? It makes no sense that they're spraying chemicals to "control the masses" when the masses are so easily controlled via the media, not to mention the fact that, unless they've got some kind of special filters shoved down their tracheas, they'd be spraying themselves as well.
Stop watching YouTube and start watching Frontline or Nova or something that's at least supported by scientific evidence. Contrails are not automatically left by all planes, either.