How does Canon 6d II shoot the video of 1: 1, and how to make correct lighting when shooting (how to turn on two flashlights constantly).

"Make a video of 1: 1"-If you mean that the aspect ratio of the video picture is 1: 1, it won't work. There are only three camera resolution modes, 3840*2 160, 1920* 1080, 1280*720.

How to use light-photography is to draw with light. Different lights have different effects, and there is no certain rule, mainly depending on what effect is pursued. There are usually two lights, one is the main light on the front and the other is the side light at 45 degrees above the side. Some also use small backlights on the top and back of the sides. . . . Wait a minute.

You can't shoot video with flash! Remember your name, flash, flash is instant! Can't shine continuously.

To shoot a video, you need a photographic lamp. Photographic lamps need continuous power supply, and even power-saving LED lamps need high-power lithium batteries.

The magical bull flash has never been used. If it is not dual-purpose, it is impossible to provide light source by shooting video.