diff --git a/teach/dcs290/s2024.html b/teach/dcs290/s2024.html
index 5bd4598..b6d0e9a 100644
--- a/teach/dcs290/s2024.html
+++ b/teach/dcs290/s2024.html
@@ -108,6 +108,7 @@ <h2 id='section_title'> <span class='highlight'><font color="#006600"> > Schedul
   <td><a class="link-other" href="slides-24/lec_1.pdf"><img src="../acc/PDF_icon.png" height=20 />Lexical Analysis: Intro, RegEx</a></td>
   <td align="center"><font color="purple"><a class="link-other" href="https://github.com/arcsysu/SYsU-lang2/tree/master/task/0">proj0</a> out</font>
 	  [<a class="link-other" href="https://arcsysu.github.io/SYsU-lang2/#/task0_doc/task0">doc</a>]
+	  [<a class="link-other" href="https://www.bilibili.com/video/BV12J4m1j7qF"><img src="../acc/video_icon.png" height=20 /></a>]
   </td>
   <td align="center"></td>
  </tr>
@@ -123,8 +124,8 @@ <h2 id='section_title'> <span class='highlight'><font color="#006600"> > Schedul
   <td><a class="link-other" href="slides-24/lec_3.pdf"><img src="../acc/PDF_icon.png" height=20 />Lexical Analysis: NFA/DFA (2)</a></td>
   <td align="center"><font color="red"><s>proj0 due</s></font> <br>
 	  <font color="purple"><a class="link-other" href="https://github.com/arcsysu/SYsU-lang2/tree/master/task/1">proj1</a> out</font>
-  	[<a class="link-other" href="https://arcsysu.github.io/SYsU-lang2/#/task1_doc/overview">doc</a>],
-	<a class="link-other" href="slides-24/proj1.pdf"><img src="../acc/PDF_icon.png" height=20 />ppt</a>  
+  	[<a class="link-other" href="https://arcsysu.github.io/SYsU-lang2/#/task1_doc/overview">doc</a>]
+	[<a class="link-other" href="https://www.bilibili.com/video/BV17Z42187p4"><img src="../acc/video_icon.png" height=20 /></a>] 
   </td>
   <td align="center"></td>
  </tr>
@@ -155,8 +156,10 @@ <h2 id='section_title'> <span class='highlight'><font color="#006600"> > Schedul
   <td>wk4: 3/21</td>
   <td><a class="link-other" href="slides-24/lec_7-split.pdf"><img src="../acc/PDF_icon.png" height=20 />Syntax Analysis: Top-down (1)</a></td>
   <td align="center">
-   <font color="#C0C0C0">proj1 due</font> / <font color="purple"><a class="link-other" href="https://github.com/arcsysu/SYsU-lang2/tree/master/task/2">proj2</a> out</font>
+   <font color="#C0C0C0">proj1 due</font>
+	  <br><font color="purple"><a class="link-other" href="https://github.com/arcsysu/SYsU-lang2/tree/master/task/2">proj2</a> out</font>
   	[<a class="link-other" href="https://arcsysu.github.io/SYsU-lang2/#/task2_doc/overview">doc</a>]
+	[<img src="../acc/video_icon.png" height=20 /> <a class="link-other" href="https://www.bilibili.com/video/BV15K421i73i">bison</a> / <a class="link-other" href="https://www.bilibili.com/video/BV1C2421P7xY">antlr</a>] 
   </td>
   <td align="center"></td>
  </tr>