fix

src/teacher/screen-projection/index.tsx

@@ -61,7 +61,6 @@ export default defineComponent({
     return () => (
       <div class={styles.screenProjection}>
         <OHeader
-          isBack
           desotry={false}
           rightText="投屏帮助"
           onClickRight={() => {

src/views/coursewarePlay/index.tsx

@@ -415,9 +415,10 @@ export default defineComponent({
                           muted={m.muted}
                           preload="auto"
                           class="player"
-                          poster={iconVideobg}
+                          // poster={iconVideobg}
+
                           data-vid={m.id}
-                          src={m.content}
+                          src={m.content + '#t=0'}
                           loop={m.loop}
                           autoplay={m.autoPlay}
                           onLoadedmetadata={(e: Event) => {