The video isnt availble on YouTube but someone screenrecorded it:
https://imgur.com/gallery/ag-yyY43yOAllegedly she was experiencing muscle spasms that might stem from her malnutrition/ eating disorder, after the man shaked her arm excitedly.
According to this account she ,,fell ill" & had to go leave the interview:
I think its very obvious that she is not okay and at this rate nothing would surprise me. Part of me is wondering if the studio is okay with this because her dying would boost numbers for part 2 of wicked.