diff --git a/apps/tools.js b/apps/tools.js
index 8454aaf..60fd81b 100644
--- a/apps/tools.js
+++ b/apps/tools.js
@@ -1956,7 +1956,7 @@ export class tools extends plugin {
             }
             const path = this.getCurDownloadPath(e);
             await checkAndRemoveFile(path + "/temp.mp4")
-            await checkAndRemoveFile(path + "/Thumbnail.png")
+            await checkAndRemoveFile(path + "/thumbnail.png")
             await ytDlpGetThumbnail(path, url, isOversea, this.myProxy)
             const title = await ytDlpGetTilt(url, isOversea, this.myProxy).toString().replace(/\n/g, '');
             // logger.info('标题------',title)
diff --git a/guoba.support.js b/guoba.support.js
index c01219b..2c2651d 100644
--- a/guoba.support.js
+++ b/guoba.support.js
@@ -235,11 +235,11 @@ export function supportGuoba() {
                     field: "tools.youtubeClipTime",
                     label: "YouTuBe截取时长",
                     bottomHelpMessage:
-                        "超过时长会截取指定时间（单位：秒），保护魔法的流量，计算公式：3分钟 x 60秒 = 180秒，默认不开启，最好不超过5分钟",
+                        "超过时长会截取指定时间（单位：秒），保护魔法的流量，计算公式：3分钟 x 60秒 = 180秒，默认不开启，最好不超过5分钟,0表无限or不开启",
                     component: "InputNumber",
                     required: false,
                     componentProps: {
-                        placeholder: "请输入YouTuBe视频最大时长限制",
+                        placeholder: "请输入截取时长",
                     },
                 },
                 {