Interesting video. Just as context, there are some freight sidings on EWR line just to one side of Broadmead Road, where the Park will be built. Looks like they are currently in use to bring in waste soil from HS2 and dumping it in an old quarry.
Interesting because, if Universal want to bring in a large quantity of material when building the theme park, this is an obvious solution to avoid hundreds of lorry movements. One short link road of a few hundred yards would take them straight into the transport hub area. The most informative part is the first section. Where the train halts is just before the Broadmead level crossing.