Currently when you download a teaser GIF from Matterport Cloud it does not loop. However, it's very easy to make it loop. There's many different ways to do this, but we'll describe one easy method here with ezgif.com.
First, download the teaser GIF from Matterport Cloud.
Go to ezgif.com/maker and upload your GIF file.
Scroll down past the individual frames. Make sure that Loop Count is empty so the GIF will loop forever.
Click Animate it! The looping GIF will appear below.
Right click on the image and save it to your computer.