Changed Heading on Video Section of Home Page

Until today, all of Blockchain Journal's videos reflected our coverage from the World Economic Forum (WEF) in Davos, Switzerland. So, the heading over the video section of our home page was specific to that WEF coverage. But, with David doing video coverage from DC Blockchain Summit in Washington, DC at the same time that Bob was doing video coverage from Outer Edge LA in Los Angeles, it was time to change the heading to something a bit more boring like "Blockchain Journal's Video Coverage." This will change again once our multimedia efforts involve audio-only podcasts. But for a short while, we'll be sticking with this.