The above video is explaining how to make a pipe leak test in case there is manhole in the pipeline or not. The Pipe Plug model is used to make a leak test when there is a manhole by filling the test area by water from the manhole. While the Pipe Test Plug Model is used when the manhole is not used and the water is filled through the bypass line.
All Pipe Leak Test performed by PlugCo plugs are compliant with the European Standard EN1610.