@jweaver835 the reason why they don’t advertise/make videos of other people materials is it’s a little trickier mainly with ply, MDF and hardwood.
MDF is glued, the glue can vary drastically and so can the density so the cut can be uneven/different every time, the marks left and the smell/residue from the glue can be a pain. You can buy laserable MDF but this can still be a small issue(still has glue ofcourse but its better stuff)
Ply is similar as the glue inbetween can vary
Hardwood can be tricky as a lot of them are dense, sappy or “wet”. Get a good dry piece of hardword and your pretty much good to go though.
acrylic isn’t so bad but the thickness can vary(a 6mm won’t necisarilly be 6mm I’ve seen some nearly as much as 10mm and as low as a bit over 4mm). Plus you get two kinds of making acrylics, cast or extruded one better than the other for cutting but one having better properties for some jobs.
Don’t be afraid to buy materials elsewhere but do you research and when you find a store you like go to town!