There's only one clip/snippet in there of the machine actually producing espresso and whatever comes out looks very thin and watery with no crema visible. That's worrying.
Google "bottomless portafilter shot" for how it's supposed to look.
Google "bottomless portafilter shot" for how it's supposed to look.
It's honestly not necessary. We espresso drinkers can already do that - it's called an Americano.