There is a detailed user manual for BTV included in the software download.
BTV is an application for the Macintosh that allows you to easily view and Capture video from any video input source. It works with any Macintosh compatible video input source such as video input cards, TV cards, built-in video, USB, DV, and FireWire video sources.
BTV is available as a classic application for Mac OS 8 and 9, and also a Carbonized application that runs natively under Mac OSX (the Carbon version also runs under Mac OS 8.1 or later with CarbonLib).

Overview of the Main Features

Viewing video
Video can be displayed either in a window that can be resized and dragged around the screen, or full screen on an entire monitor. When you switch to full screen mode your monitor is automatically switched to the appropriate resolution and switched back again afterwards.
For users with multiple monitors, video can be displayed Full Screen Video on any connected to your computer, ideal for viewing video one one monitor while you work on another.
The Carbon version of BTV has a global floating window feature that can make the video input window float above all other applications, allowing you to view video on top of whatever application you are using.

Movie and image capture
Frames from the live video input can be captured and saved to disk in a variety of image file formats including PICT, JPEG, TIFF, BMP, and PNG. The image files can be saved automatically to a predefined destination to enable you to instantly capture images without worrying about manually saving the file. Images can be deinterlaced automatically for capturing a high quality still image from an interlaced video source (such as TV footage). A handy floating window is available to allow you to easily capture frames or movies with a single click of the mouse:

Captured video is saved as a standard QuickTime movie that can be opened with virtually any other video application on the Macintosh (and many on the PC as well).
Options are available to choose the video compress you can free download bensoftware BTV 5.4.1 now.