Video Import failure after Unity update [5.4.1p1]

I just recently updated to Unity 5.4.1p1 due to a requirement for our game. Everything seems to be working properly except all of my videos are no longer being imported correctly. They are all Theora + Ogg files.

Every time I try to import them I get this error:

Errors during import of AudioClip Assets/Resources/Videos/1_FHD.ogg: FSBTool ERROR: Failed decoding audio clip.

I find it strange that the error is calling the asset an audioClip, but I know .ogg can also be an audio format.

It was working fine in the previous version. I have since tried deleting the meta files before trying to re-import the videos and I have tried importing different file formats with similar results.

Any help resolving this error would be much appreciated

Thanks.