…tion to detail here. That he was born and raised in the Netherlands tells us he’s not an immigrant. It doesn’t tell us whether he’s a migrant — a migrant is not necessarily an immigrant, but can simply be someone who travels for work, often around seasons (see Merriam-Webster and Cambridge Dictionary). I have no idea whether this young man is a migrant, and AP doesn’t tell us.
The video originates with Britain First, a UK group. The term “migrant” is routinely used in UK media to describe immigrants. Migrant workers are generally referred to as just that. If you check Britain First’s Gab feed, you will quickly find mentions of “migrants” wreaking havoc, and the meaning is unambiguous. So this criticism of the fact-check appears misplaced.