feat: add video/gif medias

src/error.rs

@@ -0,0 +1,25 @@
+use std::{
+    error::Error,
+    fmt::{Display, Formatter, Result},
+};
+
+#[derive(Debug)]
+pub struct OolatoocsError {
+    details: String,
+}
+
+impl OolatoocsError {
+    pub fn new(msg: &str) -> OolatoocsError {
+        OolatoocsError {
+            details: msg.to_string(),
+        }
+    }
+}
+
+impl Error for OolatoocsError {}
+
+impl Display for OolatoocsError {
+    fn fmt(&self, f: &mut Formatter) -> Result {
+        write!(f, "{}", self.details)
+    }
+}