I suspect that all these clips and programmes were filmed at the same time because Björn is not only wearing the same clothes, but he looks the same (his hair, etc!)  - covering general promotion for Mamma Mia! The Party in Rotterdam, as well as celebrating its first year (the show opened on 27 September 2024), its extension and also the 250th show. It would make sense to film these things ahead of time and use them when appropriate.

What they perhaps did not anticipate when filming all this promotion, was that the show would end suddenly and abruptly when the show was declared bankrupt, a victim of mismanagement.  Apparently the cast received this news out of the blue and found themselves suddenly out of work. There had been rumours of payment problems for a while with suppliers and freelancers receiving little or no pay from the Belgian producer of Just Entertainment in charge of the show.

1. Shownieuws
    
2. RTL Boulevard - about the show's extension
   Broadcast: Sunday 10 August 2025
   Note this clip has been blocked by RTL Boulevard due to copyright.
    
3. Mamma Mia! The Party - 250th Show Greeting
   Note this clip has also been blocked due to copyright.
    
4. VRPO podcast De Machine

Thanks to Monique Hoevens, Gerard Hesen, Peter Manton, Martijn Bossema and Gabriela Neira.
YouTube link c/o 3voor12