Interpret this Bitcoin script, please:

# To remote node with revocation key

OP_DUP OP_HASH160 OP_EQUAL

OP_IF

OP_CHECKSIG

OP_ELSE

OP_SWAP OP_SIZE 32 OP_EQUAL

OP_NOTIF

# To local node via HTLC-timeout transaction (timelocked).

OP_DROP 2 OP_SWAP 2 OP_CHECKMULTISIG

OP_ELSE

# To remote node with preimage.

OP_HASH160 OP_EQUALVERIFY

OP_CHECKSIG

OP_ENDIF

OP_ENDIF