Use correct resource URL when loading videos

On HTML5, `VideoCutscene` was not stripping the library prefix
from the video file path, causing the video to fail to load.

Fixes FPIQ-281.

source/funkin/play/cutscene/VideoCutscene.hx

@@ -61,7 +61,7 @@ class VideoCutscene
     VideoCutscene.cutsceneType = cutsceneType;
 
     #if html5
-    playVideoHTML5(filePath);
+    playVideoHTML5(rawFilePath);
     #elseif hxCodec
     playVideoNative(rawFilePath);
     #else