I am not familiar with St. Pius X. Below are some videos explaining his life, work, and death.
Here’s an overview of St. Pius X’s life and work (plus great pictures). Lecture by Fr Pius X Harding, O.S.B. at the 2016 Day of Reflection for The Equestrian Order of the Holy Sepulchre of Jerusalem (Northwestern Lieutenancy, USA.) Held at Mount Angel Abbey in Oregon, USA.
Pathé silent newsreel of his death:
And here’s a sermon on modernism being warned about by Pope St Pius X:
I’m not sure I am fully in line with all the critiques of modernism and of certain individuals in this last video, but it’s a perspective worth contemplating. And the video speaks to something of the saint’s life and passions.