BUTAOTOME’s youtube channel has been left inactive after its first usage (samples for the C89 releases), but it suddenly came back! They just uploaded the video they showed at last year’s december live, announcing their major debut, the mini-album release and the upcoming live in March so most of this is outdated. Comp also tweeted that they are planning to upload more stuff in future.
Major-related videos might be uploaded there or on Avex’s youtube channel.