ExoPlayer can't play Vimeo videos

[professorkester]

When I try to play a video hosted on Vimeo, the player throws a java.security.cert.CertificateException (this is Exoplayer 1). It used to work before, any idea why the Vimeo certificates are not being recognised? I'm using the DefaultUriDataSource implementation (which uses HttpsURLConnection).

[martijn00]

This is a sort of question that belongs on Stackoverflow, as this goes into implementation details and not on the library itself.