This is a video on how to use a 3D printer. It's something I find quite interesting and see as a valuable tool.
Positives: Very useful, clear info (CNC vs. 3D printing. Nice close-ups of the machine at work.
Improvements: Shots are very close-cropped, and the lighting is very low. The sound is inconsistent in volume.
Positives: good explanation of what the printers can do and the variety available. good job showing the software along with the hardware. good job covering the information without sounding too techy.
Improvements: could selectively used background music when not talking
Positives: Very well articulated instructions with a great visual help nice variety of shots that complement the narration
Improvements: Lighting could be improved Audio could be handled better, using a better mike would eliminate the background noise