Shutterstock® is a great microstock website for selling images and video clips. Most of these video clips will be branded by the customer to match their needs. Some of the most popular video clips are medical, time lapse, wildlife, slow motion and green screen. Below is a summary of their video requirements.

Shutterstock's requirements are very similar to iStock. They prefer clips with a duration of 5 to 60 seconds and a maximum size of 4 GB. The file formats that they accept are .mov, .mp4 and .mpg with the following frame rates.

Shutterstock Frame Rates Requirements
23.98, 24, 25, 29.97, 30, 50, 59.94, 60 fps

Although the most popular resolution is still HD, the 4K is becoming very popular. The following is their list of acceptable resolutions and Codecs. Shutterstock suggests that you upload your highest resolution (4K or HD) and they will create the other versions in SD and for the Web.

Shutterstock Resolution Requirements
4K – 4096x2160 4096×2160 4096×2304 4000×2160 3840×2160 3996×2160 4800×2700
2K & 2.5K – 2048×1080 2400×1350 2432×1366 2702×1520 2704×1520
HD – 1920x1080 1280×720 1440×1080 (only if 1.778 aspect ratio) 1888×1062 1920×1088
SD – 640×480 703×576 720×480 720×486 720×576

Shutterstock Codecs Requirements
PhotoJPEG - Non-DV progressive scanned video. Use the 75% / high quality level.
MotionJPEG - Non-DV interlaced video. Use the 75% / high quality level.
DVCPro
ProRes 422 / 422 HQ / 4444 – Export with as little compression as possible.
H.264 - If encoding to this format use the “best” quality.
PNG - Only use for footage (animation) requiring an alpha channel.

It might be tempting to include audio in your clips. Shutterstock prefers that you omit any audio, but will accept clips with audio if the audio substantially enhances the clip.

If you already have contributed images to Shutterstock, then you are familiar with the upload process, the Content Editor and their great Keyword Tool. Video clips have the same metadata requirements for title, description and keywords. However, they do suggest that you include other information such as the action in the clip, as well as the characteristics for any people in the clip. Also, you will need to supply the model and property releases as needed.

You will not upload the video clips via the online upload process. Your first step is to upload the clip via FTP to the main area of the FTP client. Do not create or use an existing folder. Once uploaded, it will appear in your account and the online Content Editor.

One nice feature at Shutterstock is the ShutterTalk Live series of training videos. You can get a lot of information about submitting both images and video from this training.

FTP Information
https://www.shutterstock.com/contributorsupport/articles/kbat02/000006653?q=ftp&l=en_US&fs=Search&pn=1

ShutterTalk Live contributor training videos.
https://www.shutterstock.com/blog/shuttertalk-livestream-series