I don't have any videos or pictures (yet) of my personal cage, but this is what I do and it's working extremely well.
Joann's and Hobby Lobby had a sale on fleece recently so I stocked up on about 3 yards each of 4 different prints (I have a 2x5 cage and used the excess fleece to make pee pads and lap pads). I use wood pellets I buy at tractor supply as my absorbent layer on the coroplast and then cut the fleece to size and lay it on top. I leave it wide enough on the sides to fold over the coroplast and tuck under although the grids actually keep it in place pretty well. I use binder clips in a few places where the coroplast leaves a bit of a wider gap with the grids. After I add in hideys, toys, and the pigs run on it, it actually flattens down pretty well. Once a day I vacuum or sweep up the poos while the piggies have floor/cuddle time, add all their stuff back and put them back in before bed. Once a week I remove the fleece, stir the pellets to mix in the sawdust, and replace with a new fleece print while the other washes. I wash the fleece (and all their fleece accessories) in hot water with no scent detergent and vinegar. Cage cleaning process takes no more than 15 minutes or less most days. The wood pellets only need to be changed out at least every 8 weeks, but I've read some people go longer. I've used mine for 2 weeks now and no smell and no fuss. They've been pretty amazing.
As for hay - I have the piggy party patio and a kitchen insert. I line the cavy kitchen with uncovered wood pellets and then put down copious amounts of hay on top of the pellets, then each piggy has his own bowl in an opposite corner full of food pellets. Right now they share veggies out of one giant ceramic bowl because Boo only eats veggies if he sees Remi eat them (silly pigs). No hay ends up on the fleece and stays contained to the patio/kitchen area. I spot clean there and change out the pellets as needed. Unfortunately I'm not one of the lucky piggy owners whose pigs exclusively poo and pee in the kitchen area. My boys go everywhere LOL. My kitchen area is even covered, but nope.
I very briefly used paper bedding in the kitchen. Hated it and quickly went back to pellets.
Hope that helps a little. My cage is in my bedroom and I just don't have any good angles to take a decent picture without showing off most of the room. The fleece is seriously easy to use. I have a midwest cage in my hubby's man cave that the piggies use sometimes when we are out there and I made a uhaul/fleece liner for it that is also working very well. I just take it out, shake it off outside, and wash it once a week. It doesn't smell, but they aren't in it that much either to do more than poo a few times and pee.