There are, as mentioned earlier, no Video fields on that post type, neither when you create a new or when you look at the existing one you linked.
I see how you use a Post Relationship, not a Post Field.
This is not the same as above exampled, but it should still work as we can choose the field source (another post by relationship)
I think the field "Movie Clip" is the one you want to display, but it's of the related post type Movies
Then again in this Post, there is no output made for that field. the post Body is empty, and you usee no Blocks or Content Templates.
Hence the insertion and display of those items are made elsewhere, and you'd have to ask that Plugins how to display things the way you require (if it is Elementor, for example)
However, I am not sure that will work in Elementor's dynamic inputs, as this is a Post Relationship, which you usually can display data of only using Toolset.
Cany you confirm you insert both Video and Image with Elementor? Even if it is thru a ShortCode of Toolset, this can interfere and eventually break.
I can show you how to build this with Blocks, as mentioned before, or Views, but with Elementor it would be best to consult Elementor Support.
Are you using an Elementor Template here? Because I was not able to spot any Elementor items on the post itself either.
I suggest using only Blocks, but if you require Elementor, and think the issue happens due to Toolset, I can also try according to instructions to replicate this, if you can outline the precise steps you take
It must be in fact related to Elementor because this works just fine on any other install I tried - but those do not use Elementor, instead, they use Blocks or Views (classic) only.
Thanks!