How to add YouTube subscribe button in blogger

1. First of all go to YouTube Developer's Page. There you will see a tool that will allow you to configure embedded YouTube subscribe button.
2. All you have to do is to fill the required data and scroll down to the find the generated code.
3. Now, Go to the blogger dashboard> Layout> Add a gadget> Choose HTML/Javascript from the list.
4. Copy and Paste generated YouTube subscribe button code into it.
5. Finally save your widget and you're done!