> The last elections in Germany were massively impacted by a polarizing video from a blue haired Youtuber

I'm gonna have to say [citation needed].

It is true that the video went viral and was very controversial, but the only effect was that the green party gained about 5% in the 18-29 age group, according to polling statistics. All other age groups were unaffected [1].

Also note that this election was for the parliament of the European Union.

[1] https://www.spiegel.de/politik/deutschland/rezo-effekt-hat-e... (German)