The getting started in woodworking video showed only one hole drilled in the right front leg level with the vise.
Woodworking bench holes. Dog holes are used to secure what are called bench dogs often made of medium hard woods such as mahogany cherry and or walnut. With numerous features that are designed with the woodworker in mind like built in vices and dog holes to make securing workpieces easier this bench can make working on your projects much easier and more precise. These can be quite sophisticated involving parts that can be moved both horizontally and vertically. But a board larger than that must be secured between the vise dog and a bench dog.
Typically dog holes measure of an inch in diameter spaced 2 3 inches apart depending on the length of your workbench and your specific needs. The simplest mechanism is simply to stick a dowel into a hole drilled into the front of your bench. Secure the jig to work bench and carefully drill hole. Ideally space the dog holes so you can secure a board of any width to the workbench ken so start by measuring your vise s capacity.
Using a sharp object punch small dimple marks on your work bench where you want to drill holes. Secure forstner bit in your drill.