Add Douyin video downloader with auto-cookie feature

Server/s_v_web_id.js

@@ -0,0 +1,15 @@
+function create_s_v_web_id() {
+    var e = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".split("")
+        , t = e.length
+        , n = (new Date).getTime().toString(36)
+        , r = [];
+
+    r[8] = r[13] = r[18] = r[23] = "_",
+        r[14] = "4";
+    for (var o, i = 0; i < 36; i++)
+        r[i] || (o = 0 | Math.random() * t,
+            r[i] = e[19 == i ? 3 & o | 8 : o]);
+    return "verify_" + n + "_" + r.join("")
+}
+
+console.log(create_s_v_web_id())