This type of solar eclipse viewer will enlarge the image projected by the power of the binos you use. In this case, 12x larger than a pinhole viewer. Plus, it's a brighter image by allowing more light to come through.
My wife asked me to make this video because we will be visiting relatives in a total eclipse zone this April. These are inexpensive and relatively easy to make and will be fun to make with your kids, wife, husband, friends, whoever, or just for yourself.
Feel free to ask any questions in the comments section.
Here is a demonstration of what you can see with this viewer:
   • Best Solar Eclipse Viewer Demo