I thought so too, I've seen the video on Reddit from a few years back, but I guess it happened in Texas during their ice storm this year too. I'm taking it with a grain of salt, but everything I'm reading says it does happen when there are rapid drops to extreme cold temps since the freezing point of sap is really low. It looks like it could just result in large cracks in the trees vs like a Michael Bay explosion but it's supposedly sounds like gunshots and the Sioux and Cree have names for it.

I'm theost skeptical of skeptics normally but this one I'm not ruling out.