be-at.tv/ has been buggy for weeks and now just redirects to their YouTube channel.
Not sure if their players will ever work again
I didn't add many players from them lately because I knew something's stinking.
Their website is/was Flash only. And browsers kill Flash over time, e.g. latest Chrome now having a "Click to activate Flash" until 2020, when they entirely remove Flash support.
Either they're re-building their site or go YouTube-only. Their communication sucks.