Can I control the focus for video?

[opec]

Is there a way to control focus while recording video? Or at least have a fixed focus that i can set before i start recording? I'm trying to get some cool video of some hummingbirds on my grandma's balcony, and they let me stand REALLY close to the feeder. The birds come out blurry, because i think the focus is fixed on a much further distance.