I've never seen a video that will help. Do you have a frost plug that is corroded and leaking coolant? What I do is to take a suitable punch & hammer then carefully tap at one edge of the frost plug until it is driven inward enough so the coolant runs out. Once it has been carefully driven fully inward you can then grab it with a pair of pliers and pry it out. Do Not let it fall into the block and/or leave it there. The tough part is getting a new frost plug driven in place and sealed properly so it doesn't leak. If in doubt, let someone at a good repair shop do this one.