mouseenter = function(event, d) {
d3.select(".tooltip").text(
`Video ID: ${d["ID"]}, Start Time: ${d["Start"]}, Licensed: ${
d["Licensed"] ? "Yes" : "No"
}`
);
d3.selectAll(".video").attr("fill", colors.blue);
d3.select(this)
.attr("fill", colors.orange)
.raise();
}