diff --git a/src/main.rs b/src/main.rs
index 15eb633..8687605 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,8 @@
 use gio::prelude::*;
 use gtk::prelude::*;
-use std::env::args;
 use gtk::Orientation;
+use std::env::args;
+use std::process::Command;
 
 const SPACING: i32 = 16;
 
@@ -14,25 +15,45 @@ fn build_ui(application: &gtk::Application) {
     window.set_default_size(400, 100);
 
     let vertical = gtk::Box::new(Orientation::Vertical, SPACING);
-    let url = gtk::Entry::new();
+    let input_url = gtk::Entry::new();
     let horizontal = gtk::Box::new(Orientation::Horizontal, SPACING);
     let convert_to_mp3 = gtk::CheckButton::with_label("convert to mp3");
     let button = gtk::Button::with_label("Go!");
 
-    url.set_placeholder_text(Some("Enter URL here"));
+    input_url.set_placeholder_text(Some("Enter URL here"));
 
     horizontal.set_spacing(SPACING);
     horizontal.set_homogeneous(true);
 
     window.add(&vertical);
 
-    vertical.add(&url);
+    vertical.add(&input_url);
     vertical.add(&horizontal);
 
     horizontal.add(&convert_to_mp3);
     horizontal.add(&button);
 
     window.show_all();
+
+    button.connect_clicked(move |_| {
+        let url = input_url.get_buffer().get_text();
+        println!("url: {}", url);
+        let mut youtube_dl = Command::new("youtube-dl");
+
+        if convert_to_mp3.get_active() {
+            println!("convert to mp3: true");
+            youtube_dl.arg("--extract-audio");
+            youtube_dl.arg("--audio-format");
+            youtube_dl.arg("mp3");
+        }
+
+        youtube_dl.arg("--output");
+        youtube_dl.arg("~/Downloads/%(title)s.%(ext)s");
+        youtube_dl.arg(url);
+
+        let output = youtube_dl.output().expect("failed to execute process");
+        println!("exit status: {:#?}", output);
+    });
 }
 
 fn main() {