The tiny white, worm-like creatures sometimes found in strawberries can be fruit fly larvae, including larvae of the spotted-wing drosophila (Drosophila suzukii).
Unlike many common fruit flies, female spotted-wing drosophila can lay eggs in ripe or nearly ripe, undamaged soft-skinned fruit. Their larvae develop inside fruits such as strawberries, raspberries, blueberries, and cherries.
However, not every white worm seen in a strawberry is necessarily a spotted-wing drosophila larva. Identification from a viral video alone can be difficult.