diff --git a/src/content.ts b/src/content.ts
index 99ef55af..b484f1d4 100644
--- a/src/content.ts
+++ b/src/content.ts
@@ -574,8 +574,9 @@ async function startSponsorSchedule(
         return;
     }
 
-    logDebug(`Considering to start skipping: ${!getVideo()}, ${getVideo()?.paused}`);
-    if (!getVideo()) return;
+    const video = getVideo();
+    logDebug(`Considering to start skipping: ${!video}, ${video?.paused}`);
+    if (!video) return;
     if (currentTime === undefined || currentTime === null) {
         currentTime = getVirtualTime();
     }
@@ -583,7 +584,7 @@ async function startSponsorSchedule(
 
     updateActiveSegment(currentTime);
 
-    if (getVideo().paused || (getVideo().currentTime >= getVideo().duration - 0.01 && getVideo().duration > 1)) return;
+    if (video.paused || (video.currentTime >= video.duration - 0.01 && video.duration > 1)) return;
     const skipInfo = getNextSkipIndex(currentTime, includeIntersectingSegments, includeNonIntersectingSegments);
 
     const currentSkip = skipInfo.array[skipInfo.index];
@@ -598,7 +599,7 @@ async function startSponsorSchedule(
             skipInfo.index !== -1 && timeUntilSponsor < skipBuffer && shouldAutoSkip(currentSkip)
         )
     ) {
-        getVideo().muted = false;
+        video.muted = false;
         videoMuted = false;
 
         for (const notice of skipNotices) {
@@ -712,7 +713,7 @@ async function startSponsorSchedule(
     if (timeUntilSponsor < skipBuffer) {
         await skippingFunction(currentTime);
     } else {
-        let delayTime = timeUntilSponsor * 1000 * (1 / getVideo().playbackRate);
+        let delayTime = (timeUntilSponsor * 1000) / getVideo().playbackRate;
         if (delayTime < (isFirefox() ? 750 : 300)) {
             let forceStartIntervalTime: number | null = null;
             if (isFirefox() && delayTime > 300) {
@@ -764,13 +765,13 @@ async function startSponsorSchedule(
             logDebug(`Starting timeout to skip ${getVideo().currentTime} to skip at ${skipTime[0]}`);
 
             // 提前触发跳过通知
-            let advance: number = 0;
             if (Config.config.advanceSkipNotice && Config.config.skipNoticeDurationBefore > 0) {
-                advance = Config.config.skipNoticeDurationBefore * 1000;
+                delayTime -= Config.config.skipNoticeDurationBefore * 1000;
             }
+
             const offset = isFirefox() ? 600 : 150;
             // Schedule for right before to be more precise than normal timeout
-            currentSkipSchedule = setTimeout(skippingFunction, Math.max(0, delayTime - offset - advance));
+            currentSkipSchedule = setTimeout(skippingFunction, Math.max(0, delayTime - offset));
         }
     }
 }
@@ -837,12 +838,11 @@ function checkDanmaku(text: string, offset: number) {
     }, offset * 1000 - 100);
 }
 
-let observer: MutationObserver = null;
+let danmakuObserver: MutationObserver = null;
 const processedDanmaku = new Set<string>();
-
 function danmakuForSkip() {
     if (!Config.config.enableDanmakuSkip || Config.config.disableSkipping) return;
-    if (observer) return;
+    if (danmakuObserver) return;
 
     const targetNode = document.querySelector(".bpx-player-row-dm-wrap"); // 选择父节点
     const config = { attributes: true, subtree: true }; // 观察属性变化
@@ -868,12 +868,12 @@ function danmakuForSkip() {
             }
         }
     };
-    observer = new MutationObserver(callback);
-    observer.observe(targetNode, config);
+    danmakuObserver = new MutationObserver(callback);
+    danmakuObserver.observe(targetNode, config);
     addCleanupListener(() => {
-        if (observer) {
-            observer.disconnect();
-            observer = null;
+        if (danmakuObserver) {
+            danmakuObserver.disconnect();
+            danmakuObserver = null;
             processedDanmaku.clear();
             return;
         }