It is possible but, because it’s a video image (and is fixed at 720 x 480 pixels), I wouldn’t go any larger than a 4″ x 6″ image.
The final quality will depend on the quality of your original video. Obviously the better the video camera and quality of the original video, the better the resulting image will be.
Drop the file on the timeline, position the cursor accordingly, change the preview window setting to Best (Full) and click the floppy disk icon (Save Snapshot to File) at the top right of this window. Save itas either a jpg or png and print it.