Good find whatever it is.
Could be a play of light, but hard to tell. Possibly a shadow.
It defininately changes shape or motion, but as mentioned, it could be a shadow.
The reason I say shadow is it seems too good to be true. I don't have the skills to freeze it and blow it up, but after stopping it at different
intervals, I can see 'something' moving across the bush.
Incidentally, I see it on 3:11 / 3:12.
I don't see any listings describing it as a BF sighting... which in itself is good as it shows as less of a hoax atmosphere, I am just amazed that
someone ( you, if it was you who noticed this ), came across this by accident.
Good find whatever it is, nice to see people are taking a second look.