There are so many things to do when you decide to launch a new youtube video on your channel. Because a good thumbnail can make a huge difference in views, so you will have to create an attractive one to let anyone click on your video and watch it. But, to create a good design, you will have to hire a designer and pay him expensively to get great results. People can spend a lot of money and time to find a graphic designer to make a channel art or thumbnail and even then it might not work out as they expected. You might not like the result and need to find and hire another thumbnail designer.