diff --git a/server/src/video.rs b/server/src/video.rs
index d48787e..9a55eef 100644
--- a/server/src/video.rs
+++ b/server/src/video.rs
@@ -7,6 +7,7 @@ use gst::prelude::*;
 use lesavka_common::lesavka::VideoPacket;
 use tokio_stream::wrappers::ReceiverStream;
 use tonic::Status;
+use tracing::{debug, enabled, Level};
 
 pub async fn spawn_camera(
     dev: &str,
@@ -64,6 +65,22 @@ pub async fn spawn_camera(
 
                 let map = buffer.map_readable().map_err(|_| gst::FlowError::Error)?;
 
+                if enabled!(Level::DEBUG) {
+                    if let Some(slice) = map.as_slice().get(0..5) {
+                        match slice[4] & 0b1_1111 {
+                            // 0x07 = SPS, 0x05 = IDR (Annex-B “byte-stream”)
+                            0x07 | 0x05 => {
+                                debug!(
+                                    "🎞️  monitor {id}: got NAL {:02X}, {} bytes",
+                                    slice[4],
+                                    map.as_slice().len()
+                                );
+                            }
+                            _ => {}
+                        }
+                    }
+                }
+
                 let pkt = VideoPacket {
                     id,
                     pts: pts_us,