Reset upload form also after failed jobs (so next upload works)

templates/index.html

@@ -568,6 +568,10 @@
           } else if (job.status === "failed") {
             liveFail(job.error || "Obdelava ni uspela");
             $("#submit-btn").disabled = false;
+            // Reset tudi po napaki, da naslednji upload dela
+            pendingFile = null;
+            fileInput.value = "";
+            dz.querySelector("div").textContent = "Klikni ali povleci video sem";
           } else {
             showLive(info.friendly, `Job ${job.id} · ${job.status}`, info.pct);
           }