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@if ($sub->category->videos->count() < 2)
{{-- Display videos from all parent sub-categories --}}
@foreach ($sub->category->parentSubCategories as $parentSubCategory)
@foreach ($parentSubCategory->videos as $video)
{{-- Display video --}}
@endforeach
@endforeach
@else
{{-- Display videos from current sub-category if more than 2 --}}
@foreach ($sub->category->videos as $video)
{{-- Display video --}}
@endforeach
@endif