Is this real? You have to be really careful what goes into a furnace crucible.

I can't say this isn't but if these robots had any hydraulic fluid or liquid in their batteries I would expect to see a pretty serious explosion as it evaporates.

e.g. https://www.youtube.com/watch?v=nLxRJlcNh2A

Those explosions are in the video. They seem to be using slow motion so you can see the detail of the explosions.