The mp4 file is not imported into the streamingAssets folder.

I use unity 5.5

The mp4 file is not imported into the streamingAssets folder.

In folders other than StreamingAssets, mp4 file is imported as movie texture.
However, it is not imported from the StreamingAssets folder.

In Splugins Movie Texture, movie texture must be in StreamingAssets.

Movie texture imported outside StreamingAssets will not be reimported when moved to StreamingAssets.

What should I do?

plz help me T_T

You need to convert your video to Ogg Theora format. That’s the only format Unity supports at runtime, as stated at Unity - Manual: Movie Textures