Proponents of the theory that there's a secret geoengineering program going on often try to find odd things about snow, as they feel that unusual snow is a sign of geoengineering. In a video, one proponent claims to have two jars of water, one being snow melt, and the other being tap water. He claims the jars are at the same temperature. He then demonstrates that the melt-water jar seems to melt less additional snow than the tap water jar. He does this by adding approximately equal amounts of snow to both jars. The result being this:
However this is quite obviously because the jars of water are at different temperatures, as demonstrated by the differences in condensation noted above.
[Update] The maker of the video claims that the jar on the left does not have condensation on the outside, it's just dirt from the snow. However this is does not change the fact that there's a difference in condensation, with there being visible condensation inside the right jar.