Where Does Water Come From?, explains how clouds are formed and why water is released from clouds. The video also includes a little activity prompt for students to try that can give them a first-hand illustration of the water cycle. The video is embedded below.
I've previously shared some other resources that help students learn about the water cycle. Those resources are outlined below.
Why Are There Clouds? is a Minute Earth video that explains how clouds are formed and how they rise or fall in the sky. The nice thing about Minute Earth videos is that a list of references is included in each video's description on YouTube.
Thirstin's Water Cycle takes students on an animated and narrated tour of the water cycle from water, to vapor, to clouds, to rain. Thirstin's Tour of a Water Treatment Plant takes students on a narrated tour through a typical water treatment facility found in the United States.
Waterlife is an interactive story about the water cycle in the Great Lakes. Waterlife is a twenty part story through which students can learn about the role of water in our lives. Through the story students learn about things like fishing, pollution, invasive species, wetlands, and the politics of water conservation. When students select a part of the Waterlife story they will be able to hear narration, see visuals, and read the text of the story. Some parts of the story also contain links to external resources that student can explore.
Scholastic's Interactive Weather Maker is an activity in which students adjust temperatures and humidity levels to create rain and snow storms. Students simply move the temperature and humidity sliders until rain or snow begins to show up in the scene on their screens.