Use this link to access a 27 minute video on 3D geometry. I would NOT recommend having students watch ALL of this at once but rather use parts of it as is relevant to your units.
I am a teacher and I use educreations a LOT to create video notes for my classroom. This video is intended for my honors 6th grade students (preparing for Algebra I in 7th grade) but you could use whatever parts are relevant for your curriculum. You could also create a "fill in the blank" notes if your students need that level of scaffolding. I'll post some videos and scaffolded notes that went along with it that I use for my standard level students (studying only 6th grade material).
Virginia Standards of Learning
Focus: Problem Solving with Area, Perimeter, Volume, and Surface Area
6.10 The student will
d) describe and determine the volume and surface area of a rectangular prism.
Focus: Proportional Reasoning
7.5 The student will
a) describe volume and surface area of cylinders;
b) solve practical problems involving the volume and surface area of rectangular prisms and cylinders; and
c) describe how changing one measured attribute of a rectangular prism affects its volume and surface area.
Focus: Problem Solving
8.7 The student will
a) investigate and solve practical problems involving volume and surface area of prisms, cylinders, cones, and pyramids