: The video finishes with the glass on the ends trimmed,
: but not flush. Will I just trim them down even more, and then
: lay a thin strip of glass along each end vertically?

Later on in the project I will be installing outer stems. At that time I will apply another layer of glass and wrap several layers of glass around the ends. You can do some thing similar or you can take the loose ends, fold them around the stem and then apply another strip or two over top.