This tool is only available for INDI camera with video stream capability, specifically on Linux and Mac.
Because of the way INDI record the video, the file is written on the computer running the INDI server.

You must first set the preview rate in the Preview options. Do not use a too high value as this preview frames have to transit by the network.

The video tool appear in a new tab after the Sequence if the INDI camera you connected as video stream capability.

Select the Encoder to use for the images frames. Use RAW for best quality or MJPEG for quick preview.
With DSLR LiveView the MJPEG option give a color preview of the full frame, the RAW option give a raw central crop you can use for planetary imaging.

Select the exposure range, depending on the camera it can be a direct input box or a the drop down box and a cursor.

Depending on the camera there can be other settings for the Gain, Gamma or Brightness. The More settings button open the INDI client for this camera, this let you to access some properties specific to your camera.

Two more drop down list are to select the Image size and the Frame rate.

Check Preview on top to visualize the frames without recording.

Next are the video capture options, you can limit the video Duration in seconds or the number of Frames.

The Object name is use as a part of the filename.
The Directory where to save the video file on the computer running the INDI server.

Click the Start to start recording. The recording to the video file is always directly done by the INDI driver without any action from CCDciel.

Use the Stop button if you want the stop the recording before the planned end.