Find parent section and write it to an array?

Question

PHP

There is a Subdivision table where there are SubID and ParentID, and there is a Video table where there is a Select. In Select, SubIDs are written (406,407,469 - as an example). As a result, using Select, I need to find all SubIDs in the Subdivision table and display their ParentID parents, merge all repeated ParentIDs, display only unique ones.
The video array looks like this

Array ( 
    [0] => Array (
        [name] => Название 1 
        [select] => Array (
            [0] => 406
            [1] => 407
            [5] => 469
        )
    )
    [1] => Array ( 
        [name] => Название 2 
        [select] => Array (
            [0] => 390
            [1] => 396
            [2] => 469
        )
    )
)

It turns out, for example, for section
406, 407 - parent 1000
469 - parent 1001
390, 369 - parent 1002
The result should be such an array

Array ( 
    [0] => Array (
        [name] => Название 1 
        [parent_id] => Array (
            [0] => 1000
            [1] => 1001
        )
    )
    [1] => Array ( 
        [name] => Название 2 
        [parent_id] => Array (
            [0] => 1002
            [1] => 1001
        )
    )
)

No matter how much I try, it doesn't work. Or tell me in which direction to dig at least.