added 'this worked in the past' to error message

src/main.rs

@@ -55,7 +55,7 @@ async fn main() {
     // frame buffers from the gstreamer pipeline to send over the webrtc connection
     let (to_stream, stream) = tokio::sync::mpsc::channel::<Buffer>(10);
 
-    let rt = tokio::runtime::Handle::current();
+    // let rt = tokio::runtime::Handle::current();
 
     let stream: Arc<tokio::sync::Mutex<tokio::sync::mpsc::Receiver<Buffer>>> =
         Arc::new(tokio::sync::Mutex::new(stream));
@@ -90,7 +90,7 @@ async fn main() {
 
     // Start the gstreamer pipeline
     if let Err(e) = pipeline.pipeline.set_state(State::Playing) {
-        panic!("Could not start pipeline! {e}");
+        panic!("Could not start pipeline! Is there a video source connected?\nError: {e}");
     }
 
     let cs2 = cancel_tasks.clone();