diff --git a/src/components/Select/SelectTreeChannel.vue b/src/components/Select/SelectTreeChannel.vue
index e31e18f..c956996 100644
--- a/src/components/Select/SelectTreeChannel.vue
+++ b/src/components/Select/SelectTreeChannel.vue
@@ -1,12 +1,11 @@
 <template>
-    <el-tree-select class="stafftree" :class="{ 'stafftree--allow-device': props.allowDevice }" :props="{
+    <el-tree-select class="channel-tree-select" :class="{ 'channel-tree-select--allow-device': props.allowDevice }" :props="{
         label: 'treeLabel',
         children: 'deviceChannelList',
-    }" node-key="treeValue" v-model="state.selectId" :placeholder="props.placeholder" :clearable="props.clearable"
+    }" node-key="treeValue" v-model="selectId" :placeholder="props.placeholder" :clearable="props.clearable"
         :disabled="props.disabled" :loading="state.loading" :data="state.options" :render-after-expand="true"
-        :check-strictly="props.allowDevice" show-checkbox multiple
+        show-checkbox multiple
         style="width: 100%" filterable :filter-node-method="filterNode"
-        @change="handleChange"
         @visible-change="(e: boolean) => e && getOptions(true)">
         <template #default="{ data, node }">
             <div v-if="node.level == 1" class="flex items-center gap-2">
@@ -36,7 +35,7 @@ type Props = {
     clearable?: boolean
     autoFirst?: boolean
     apiParams?: any
-    /** 是否允许选择设备节点，默认仅选择设备下的通道 */
+    /** 是否显示录像机复选框；勾选录像机时联动选择其全部通道 */
     allowDevice?: boolean
 }
 
@@ -58,7 +57,6 @@ const queryForm = reactive<any>({
 
 const state = reactive<any>({
     loading: false,
-    selectId: selectId,
     options: [],
     type: [],
     loaded: false,
@@ -101,19 +99,15 @@ const getSelectedNodes = (values: unknown) => {
     return flattenOptions(state.options).filter((item) => selectedSet.has(String(item.treeValue)))
 }
 
-/** 同时返回选中值和节点详情，兼容原有只接收第一个参数的使用方式。 */
-const handleChange = (values: unknown) => {
-    emit("change", values, getSelectedNodes(values))
-}
-
 watch(
     selectId,
-    (newVal, oldValue) => {
+    async (newVal, oldValue) => {
         if (newVal == oldValue) return
-        state.selectId = newVal
         if (shouldLoadOptionsOnInit(newVal)) {
-            void ensureOptionsLoaded()
+            await ensureOptionsLoaded()
         }
+        if (oldValue === undefined && !hasSelectedValue(newVal)) return
+        emit("change", newVal, getSelectedNodes(newVal))
     },
     { immediate: true, deep: true },
 )
@@ -160,8 +154,8 @@ async function ensureOptionsLoaded(force = false) {
                 state.options = JSON.parse(cached)
                 state.loaded = true
                 if (props.autoFirst && state.options.length != 0) {
-                    state.selectId = state.options[0].id
-                    emit("change", state.selectId)
+                    selectId.value = state.options[0].id
+                    emit("change", selectId.value)
                 }
                 return
             }
@@ -197,8 +191,8 @@ async function getOptions(force = false) {
         }
 
         if (props.autoFirst && state.options.length != 0) {
-            state.selectId = state.options[0].id
-            emit("change", state.selectId)
+            selectId.value = state.options[0].id
+            emit("change", selectId.value)
         }
     } finally {
         state.loading = false
@@ -207,7 +201,7 @@ async function getOptions(force = false) {
 </script>
 
 <style lang="scss">
-.stafftree:not(.stafftree--allow-device)>.el-tree-node>.el-tree-node__content .el-checkbox {
+.channel-tree-select:not(.channel-tree-select--allow-device)>.el-tree-node>.el-tree-node__content .el-checkbox {
     display: none;
 }
 
diff --git a/src/components/rtsp-plugin-video/video-plugin.vue b/src/components/rtsp-plugin-video/video-plugin.vue
index c267d43..b7c5041 100644
--- a/src/components/rtsp-plugin-video/video-plugin.vue
+++ b/src/components/rtsp-plugin-video/video-plugin.vue
@@ -821,15 +821,16 @@ defineExpose({
 </script>
 
 <style scoped>
-.video-container {
-  /* 底层播放器统一保持监控画面常用的 16:9，避免被外层不规则高度拉伸。 */
-  flex: 0 0 auto;
+.video-container {
+  /* 原生插件按此节点的实际矩形创建窗口，宽度变化时由比例计算高度。 */
+  flex: 0 1 auto;
   overflow: hidden;
   display: flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
   width: 100%;
+  min-width: 0;
   height: auto;
   aspect-ratio: 16 / 9;
   position: relative;
diff --git a/src/views/device/components/preview-video/preview-video-dialog.vue b/src/views/device/components/preview-video/preview-video-dialog.vue
index 8c86e32..ff11695 100644
--- a/src/views/device/components/preview-video/preview-video-dialog.vue
+++ b/src/views/device/components/preview-video/preview-video-dialog.vue
@@ -1,7 +1,7 @@
 <template>
     <el-dialog destroy-on-close v-model="state.dialogVisible" title="预览" width="80%" append-to-body
         :before-close="handleClose">
-        <div class="flex justify-center items-start">
+        <div class="dialog-video-layout">
             <div class="min-w-[25%]">
                 <el-tree :data="channel.treeList" :props="{
                     label: 'name',
@@ -14,8 +14,8 @@
                     </template>
                 </el-tree>
             </div>
-            <div class="flex-1 overflow-hidden video-container">
-                <RtspPluginVideo ref="previewVideoRef" style="height: 500px;" @changePage="videoChangePage" />
+            <div class="dialog-video-player">
+                <RtspPluginVideo ref="previewVideoRef" @changePage="videoChangePage" />
             </div>
         </div>
         <template #footer>
@@ -202,16 +202,24 @@ defineExpose({
 </script>
 
 <style lang="scss" scoped>
-.video-container {
+.dialog-video-layout {
     display: flex;
-    justify-content: center;
-    align-items: center;
-    min-height: 60vh;
+    align-items: flex-start;
+    min-width: 0;
 }
 
-#ws-real-player {
-    width: 100%;
-    height: 100%;
+.dialog-video-player {
+    flex: 1 1 auto;
+    min-width: 0;
+    min-height: 0;
+    display: flex;
+    justify-content: center;
+    overflow: hidden;
+}
+
+.dialog-video-player :deep(.video-container) {
+    flex: 0 1 auto;
+    max-width: min(100%, calc((100vh - 180px) * 16 / 9));
 }
 
 .dialog-footer {
diff --git a/src/views/device/components/replay-video/replay-video-dialog.vue b/src/views/device/components/replay-video/replay-video-dialog.vue
index 4273f3f..38a5284 100644
--- a/src/views/device/components/replay-video/replay-video-dialog.vue
+++ b/src/views/device/components/replay-video/replay-video-dialog.vue
@@ -1,6 +1,6 @@
 <template>
     <el-dialog destroy-on-close v-model="state.dialogVisible" title="回放" width="80%" :before-close="handleClose">
-        <div class="flex justify-center items-start">
+        <div class="dialog-video-layout">
             <div v-if="state.type == 'device'" class="min-w-[25%]">
                 <el-tree :data="channel.treeList" :props="{
                     label: 'name',
@@ -13,7 +13,7 @@
                     </template>
                 </el-tree>
             </div>
-            <div class="flex-1 flex flex-col overflow-hidden video-container">
+            <div class="dialog-video-content">
                 <el-form :model="queryForm" ref="queryRef" :inline="true" @keyup.enter="doSearch">
                     <el-form-item style="width: 450px;" label="录像时间" prop="videoDateList">
                         <el-date-picker v-model="queryForm.videoDateList" date-format="YYYY-MM-DD HH:mm:ss"
@@ -35,8 +35,8 @@
                         </el-button>
                     </el-form-item>
                 </el-form>
-                <div class="flex-1 overflow-hidden video-container" style="height: 500px;">
-                    <RtspPluginVideo ref="replayVideoRef" style="height: 500px;" @changePage="videoChangePage" />
+                <div class="dialog-video-player">
+                    <RtspPluginVideo ref="replayVideoRef" @changePage="videoChangePage" />
                 </div>
             </div>
         </div>
@@ -367,3 +367,33 @@ defineExpose({
     openDialog
 });
 </script>
+
+<style lang="scss" scoped>
+.dialog-video-layout {
+    display: flex;
+    align-items: flex-start;
+    min-width: 0;
+}
+
+.dialog-video-content {
+    flex: 1 1 auto;
+    min-width: 0;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+}
+
+.dialog-video-player {
+    flex: 1 1 auto;
+    min-width: 0;
+    min-height: 0;
+    display: flex;
+    justify-content: center;
+    overflow: hidden;
+}
+
+.dialog-video-player :deep(.video-container) {
+    flex: 0 1 auto;
+    max-width: min(100%, calc((100vh - 250px) * 16 / 9));
+}
+</style>