Show the piece in motion with a 6 to 14 second clip — shoppers who watch one are noticeably likelier to buy. Clips play with the sound off, so let the making do the talking.
Before you film:
Film wearable pieces on a person, or show a functional piece being used.
Record at the highest setting your camera offers — aim for 1080p or better.
Crop the clip after upload so the frame fits the slot shoppers see.