Inappropriate transformation of <iframe> to <video>:
link "https://cdnja.r.worldssl.net/mp4/vr/lNEZ.mp4" is wrong. Correct link to video this time "https://cdnja.r.worldssl.net/mp4/ln/lNEZ.mp4". So you changed correct unsupported <iframe> with uncorrect <video>.

And yes, you make correct link here: https://www.talkchelsea.net/loan-watch/video-ex-chelsea-academy-starlet-boga-finally-opens-sassuolo-account/
But anyway you must not do this transformation at all, because you don't have information about direct links and even if you see any order in them you can not predict how exteranl service will go with its content in future. This time it must be only <iframe>