a native SegWit wallet is required (your addresses should start with bc1)
He claims that not all bc1 wallets will work with the Lightning Network.
Only P2WPKH wallets will work, i.e. multi-sig.
2FA and other P2WSHs will not work.
by the way P2WPKH is a simple single signature script similar to P2PKH (addresses starting with 1) and has nothing to do with multi-sig. similarly P2WSH is simply a pay to "script hash" scripts which can be multi-sig or any other script.