web: Milk Quest - Grey Screen on Intro starting

[desertking]

The game stays grey after the intro starts loading until the intro is finished

https://www.newgrounds.com/portal/view/565830?emulate=flash

ruffle-object.js:107 Tried to instantiate non-registered character ID 53
a.wbg.__wbg_error_e325755affc8634b @ ruffle-object.js:107

[relrelb]

The intro uses VP6 video codec, which is currently unimplemented: #723.

[torokati44]

Now that #5369 is merged, the intro video plays back fine.