Interesting video and I like the flow between these different Bitcoin layers.
I use LN and Liquid at times. I use Boltz so I can have incoming capacity in my Phoenix Wallet and pass Sats to an L-BTC Wallet (either Green or sideswap).
But in this case the variant is that to get Bitcoin with fiat. I start in a P2P market (here in Venezuela is complex). And I choose to interact in the telegram bot LNp2pbot (there is also the Robosats exchange).
And there I directly get LN to my wallet and deosiesde exchange to L-btc and sometimes I use sideswap to exchange to USDt (liquid).
The possibilities are wide.
Using p2p without KYC could be used in the flow you show in your video without any problem.
😎👾