No
underwater: algae 3500MY vs sponges, worms, shells 800MY-485MY
out of water: plants 470MY vs millipedes, tetrapod 420MY-400MY
And even on land, he seems to be wrong (or at least not up to date): https://www.nhm.ac.uk/discover/news/2018/february/plant-life..., https://www.science.org/content/article/land-plants-arose-ea...