Rename dexter.mp4 to content type in project file

Reverted dexter.mp4 from None to Content in the project file to ensure it gets copied successfully. This change also updates the related file path references and project metadata.

Author: ivandrofly

dexter.mp4 SubDBSharp.UnitTest/Assets/dexter.mp4

@@ -20,11 +20,14 @@
     <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
   </ItemGroup>
   <ItemGroup>
-    <None Update="Assets\dexter.mp4">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
     <None Update="Assets\Logan.2017.en.srt">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Remove="Assets\dexter.mp4" />
+    <Content Include="Assets\dexter.mp4">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
 </Project>