Springtime makes me think of the plant ,Jack in the pulpit. :)
https://youtu.be/BPnQdK42rcs?si=875ItNAJhqsyqBd3____ I remember seeing them in the woods when i was a kid growing up,now it seems like i never see them anywhere. :(
their flowering phase is a bit ephemeral, tho they're likelier even easier to spot when fruiting and the berries turn a bright red.
they also transplant quite easy thanks to their long-lived bulbs and take well to moderately shaded parts in most any garden...around here we get the same species in the video you posted along with the somewhat slimmer green & white floodplain variety:
