Honestly, these videos are not really entertaining for me, personally. Too long on a topic that has been discussed over and over again. Just my 2 cents.
I don't think they are meant to be "entertaining", but I could be wrong. That would probably be too much if all Dave was doing was videos about this, but this isn't the case. The merit I see is that he patiently *explains* why such and such project doesn't make sense, he doesn't just bluntly claim it doesn't. Surely for people already knowing this, you can just skip watching. But maybe, and I guess it's Dave's intention, some people who watch those videos actually didn't realize the concept was flawed from the start, and will have learned something.
I see it differently; very few -even the ones with engineering degrees- seem to recognize the flaws in Dave's reasoning. That is what worries me most. Nowadays it is all 'I've seen it on Youtube so it must be true'.
Woah, hang on. Are you claiming I'm wrong about Solar Roadways? 
Depending on which solar roadway company:
Solar Frickin Roadways: probably not
Solmove (German): probably not
Colas / Wattway (French): maybe
Solar roadways (Dutch): maybe
IMHO the first two just lack the engineering skills and funds to turn new technology into a product.
However in general you have not convinced me that solar roadways are financially not viable. I'm not falling for the '
it's all a scam to scoop up government money'; that is pure conspiracy theorism which is just BS. Big companies are pouring serious money in solar roadways; these people aren't stupid. Another failure from your side is comparing the cost of experimental technology versus commercially available technology. Added to that your view is very single sided. Personally I'd rather see a more balanced / neutral report with both sides of the story. IOW: Where you allow the companies in question to comment on your findings and include these comments in your videos. That is journalism.
For example: It seems Solar Frickin Roadways has scored some government contracts. Instead of labelling that as 'see how stupid governments are' (which to me is just another populistic and unfounded BS claim) it would have been much more interesting to figure out what these contracts actually are about. In case they are 'show and tell sessions' (which I think is the case) there should be some reports on what was the result of the tests performed. Likely there is some very interesting and (f)actual information in these reports. Based on that you can ask tough questions instead of being regarded as just another noisy nay-sayer by the solar roadway companies.