That page is extremely slow without hardware acceleration.
It (hw-accel) was off for me because I updated some things without restarting Chromium, but I dunno. It doesn't "spark joy" with me.
I am seeing that also. Continuously used ~50% of my 2015 Macbook Pro's discrete GPU and caused the system fans to kick off, just looking at the components on the landing page.
Yeah it is lagging for me too. And I do have hardware accel off as well, because of a chromium bug.