Hydrogen vs. Battery Electric Cars

I like this series but there are some things I'm still hoping will be addressed. First: I think that because the series is sponsored by Toyota, who would obviously benefit financially from increased popularization of FCEV vehicles, there is a greater burden of proving non-bias(?) in comparing FCEVs and BEVs within this series. So I'm hoping we might still hear from people representing the latter. I can understand the inclination to focus on the FCEV side because it's the lesser-known technology, and that would be fine without a biased sponsor. I agree that the more alternatives to ICE-based transportation that we get on the road, the better, and so both FCEVs and BEVs are needed. But this brings me to the second thing, which is that if the goal is to produce cleaner, greener vehicles, then FCEVs are potentially problematic due to the fact that, to my understanding, most hydrogen is produced as a byproduct of natural gas production, and so is not very clean. If that's not the case for most of the hydrogen used in stations to refill FCEVs then I'd like to know, which is part of why I hope this is covered in the series. Finally: people will argue that, just as FCEVs rely on unclean hydrogen (meaning produced from natural gas), BEVs often rely on electricity produced by power plants burning fossil fuels. FCEVs are cleanest if renewable energy is used to power electrolysis, and BEVs are cleanest if charged with renewable energy. But how scalable/efficient is renewables-powered electrolysis compared to the same for charging stations? I'm hoping maybe we'll get some discussion of this as well.