The head seems too discretely round / oval to me. With wrens and many other passerines, I feel like there should be a more distinctly thick, sloping neckline. The head here really does seem unusually hummingbird-like, altho probably not an actual hummingbird as they prefer and build cup nests.

Then again, we don’t get to see much of the overall bird, and it’s also true that when ‘thick’ birds stick their necks out, their heads can indeed look very round like that. So…

I agree that it looks like a wren. Merlin, the bird id app from Cornell, also suggested a few different wren species.