>>72354494ah so they've kept it lol, yeah b2 started off as a niconico clone. i know there are registration guides out there so if you don't want to wait you can try and find one to make an account first, this way you can at least like and bookmark videos.
the app has a much cleaner interface with three tabs at the bottom that's your homepage, your subscriptions and then your account page from left to right. the top four in blue are downloaded videos (a feature i sorely miss that's pretty much useless nowadays), watch history, bookmarks and watch later. you can play audio only with your screen locked or have a small overlay window that draws over your other apps. a nice feature they have is that videos can have multiple "uploaders" so you can easily discover new channels through collabs and the video will be featured on everyone's channels, i wish youtube did this.