That works without problems with the first regex I posted and the new one. While doing some tests with the &audioTrackId parameter, sometimes I got a /d/2$[random chars]~/ and that also works now.
Ok, not sure what is different for your case. I am currently not able to test, but it could be another CDN, not AKAMAI (maybe cloudfront?). At least I got /dm/.../video as url part.