fix: adjust video seek

backend/server.py

@@ -110,6 +110,12 @@ def _resolve_path(requested: str) -> Path | None:
 
 
 class Handler(BaseHTTPRequestHandler):
+    def handle(self):
+        try:
+            super().handle()
+        except BrokenPipeError:
+            pass
+
     def log_message(self, fmt, *args):
         sys.stderr.write(f"[backend] {self.address_string()} - {fmt % args}\n")
 
@@ -128,12 +134,34 @@ class Handler(BaseHTTPRequestHandler):
             return
         ctype, _ = mimetypes.guess_type(str(path))
         ctype = ctype or "application/octet-stream"
-        data = path.read_bytes()
-        self.send_response(status)
-        self.send_header("Content-Type", ctype)
-        self.send_header("Content-Length", str(len(data)))
-        self.end_headers()
-        self.wfile.write(data)
+        size = path.stat().st_size
+        range_hdr = self.headers.get("Range")
+        if range_hdr and range_hdr.startswith("bytes="):
+            # Parse byte range (only single ranges supported).
+            spec = range_hdr[len("bytes="):]
+            start_s, _, end_s = spec.partition("-")
+            start = int(start_s) if start_s else 0
+            end = int(end_s) if end_s else size - 1
+            end = min(end, size - 1)
+            length = end - start + 1
+            with open(path, "rb") as f:
+                f.seek(start)
+                data = f.read(length)
+            self.send_response(206)
+            self.send_header("Content-Type", ctype)
+            self.send_header("Content-Range", f"bytes {start}-{end}/{size}")
+            self.send_header("Content-Length", str(length))
+            self.send_header("Accept-Ranges", "bytes")
+            self.end_headers()
+            self.wfile.write(data)
+        else:
+            data = path.read_bytes()
+            self.send_response(status)
+            self.send_header("Content-Type", ctype)
+            self.send_header("Content-Length", str(len(data)))
+            self.send_header("Accept-Ranges", "bytes")
+            self.end_headers()
+            self.wfile.write(data)
 
     def _run_search(self, modality: str, query: str, top_k: int):
         fn = SEARCHERS.get(modality)

ui/static/app.js

@@ -251,12 +251,14 @@ function makeCard(hit, kind, modality, dark) {
     thumb.rel = "noopener";
     const v = document.createElement("video");
     v.muted = true;
-    v.preload = "metadata";
-    v.addEventListener("loadeddata", () => v.classList.add("loaded"));
+    v.preload = "auto";
     if (timestamp != null) {
       v.addEventListener("loadedmetadata", () => {
         try { v.currentTime = timestamp; } catch (_) {}
       });
+      v.addEventListener("seeked", () => v.classList.add("loaded"));
+    } else {
+      v.addEventListener("loadeddata", () => v.classList.add("loaded"));
     }
     v.src = fileUrl(filePath) + frag;
     thumb.appendChild(v);