Mark Rober — a former NASA engineer, Rober turns science into elaborate real-world builds and pranks, most famously his glitter bomb package designed to catch porch pirates, which has drawn tens of millions of views per installment is leading so far with 60%.
Veritasium — Derek Muller's channel is built on debunking misconceptions and exploring genuinely counterintuitive science. His video on a reservoir covered in 96 million shade balls has over 111 million views and is considered one of the best examples of the channel's style is second. On this few votes the split is still anyone's guess.
Everyone who has answered so far is voting from China.
The most recent vote came in 17 days ago.