What is a "serialized signed transaction"? Shown in the gray area here, describing how to apply, I think, Segwit to a transaction (particularly a Bitcoin Cash tx).  The last section is titled &quot;serialized signed transaction&quot; however it doesn't appear to be the final form of the raw tx that you can copy and paste into a bitcoin cash wallet to use &quot;sendrawtransaction&quot;.  Or is it the final raw tx form in spite of what it appears to be to me?
Example of final copy and paste form of a bitcoin cash tx:
Tx f0b9313fc11ce5ec5ac619f35dcf332530e99d185d8ee79b913bcc0b8b5e6df1

01000000
01
f5a6acfe637ceb57552e703bd4a3bb7ae10c75e81886646cf4ca641881daa4a3
00000000
6b48304502210088b72059940330faa94940a6f37b1be4d926a4d246abda8a1e6174a3a00659
040220
06e0627d6525afa275c4e730799ac11c037eed2e35a0839afcc62dfe710afb3d
4121
035e366a13be81aaada32f309b289ca26741fd55c582d6d8d394f9be7c7519974f
feffffff
02643fcb1d00000000
1976a9149b52b7016d89c5ad7645a8bbc34719b46131545288ac
0094357700000000
1976a914787b7c14737c3956456f40cf7abfca9b641afd5788ac
00000000

What the original webpage shows (but not for the same tx):

01000000
00
01
02
fff7f7881a8099afa6940d42d1e7f6362bec38171ea3edf433541db4e4ad969f
00000000
494830450221008b9d1dc26ba6a9cb62127b02742fa9d754cd3bebf337f7a55d114c8e5cdd30be
0220
40529b194ba3f9281a99f2b1c0a19c0489bc22ede944ccf4ecbab4cc618ef3ed01
eeffffff
ef51e1b804cc89d182d279655c3aa89e815b1b309fe287d9b2b55d57b90ec68a01
00000000
ffffffff
0220
2cb20600000000
1976a9148280b37df378db99f66f85c95a783a76ac7a6d5988ac
9093510d00000000
1976a9143bde42dbee7e4dbe6a21b2d50ce2f0167faa815988ac
000247304402203609e17b84f6a7d30c80bfa610b5b4542f32a8a0d5447a12fb1366d7f01cc44a
0220
573a954c4518331561406f90300e8f3358f51928d43c212a8caed02de67eebee
0121
02
5476c2e83188368da1ff3e292e7acafcdb3566bb0ad253f62fc70f07aeee6357
11000000

The one from the example website shows the &quot;00&quot; and the &quot;02&quot; being added near the beginning and that huge mess of stuff after the final output is mentioned.  Yet the first example I gave is the raw data straight from a &quot;getrawtransaction&quot; through the bitcoin cash wallet and it does not contain those things and yet is still considered to be valid.  Or is all that other stuff just basically &quot;extra&quot;?
I would like to comment on your "mess of stuff"... maybe not the best way to get support, if you don't understand what it is, and define it as such. I decode it here for you:

VERSION
 01000000

SEGWIT (BIP141): this is a segwit tx, marker=00
       (BIP141): flag=01

TX_IN COUNT [var_int]: hex=02, decimal=2
 TX_IN[0]
  TX_IN[0] OutPoint hash (char[32])
  9F96ADE4B41D5433F4EDA31E1738EC2B36F6E7D1420D94A6AF99801A88F7F7FF
  TX_IN[0] OutPoint index (uint32_t)
  hex=00000000, reversed=00000000, decimal=0
  TX_IN[0] Script Length (var_int)
  hex=49, decimal=73
  TX_IN[0] Script Sig (uchar[])
  4830450221008B9D1DC26BA6A9CB62127B02742FA9D754CD3BEBF337F7A55D114C8E5CDD30BE022040529B194BA3F9281A99F2B1C0A19C0489BC22EDE944CCF4ECBAB4CC618EF3ED01 
  TX_IN[0] Sequence (uint32_t)
  EEFFFFFF
 TX_IN[1]
  TX_IN[1] OutPoint hash (char[32])
  8AC60EB9575DB5B2D987E29F301B5B819EA83A5C6579D282D189CC04B8E151EF
  TX_IN[1] OutPoint index (uint32_t)
  hex=01000000, reversed=00000001, decimal=1
  TX_IN[1] Script Length (var_int)
  hex=00, decimal=0
  TX_IN[1] Sequence (uint32_t)
  FFFFFFFF
TX_OUT COUNT, hex=02, decimal=2
 TX_OUT[0]
  TX_OUT[0] Value (uint64_t)
  hex=202CB20600000000, reversed_hex=0000000006B22C20, dec=112340000, bitcoin=1.12340000
  TX_OUT[0] PK_Script Length (var_int)
  hex=19, dec=25
  TX_OUT[0] pk_script (uchar[])
  76A9148280B37DF378DB99F66F85C95A783A76AC7A6D5988AC
 TX_OUT[1]
  TX_OUT[1] Value (uint64_t)
  hex=9093510D00000000, reversed_hex=000000000D519390, dec=223450000, bitcoin=2.23450000
  TX_OUT[1] PK_Script Length (var_int)
  hex=19, dec=25
  TX_OUT[1] pk_script (uchar[])
  76A9143BDE42DBEE7E4DBE6A21B2D50CE2F0167FAA815988AC

WITNESS TXIN[0] stack elements: hex=00, decimal=0
WITNESS TXIN[1] stack elements: hex=02, decimal=2
 WITNESS data[0]:
  47304402203609E17B84F6A7D30C80BFA610B5B4542F32A8A0D5447A12FB1366D7F01CC44A0220573A954C4518331561406F90300E8F3358F51928D43C212A8CAED02DE67EEBEE01
 WITNESS data[1]:
  21025476C2E83188368DA1FF3E292E7ACAFCDB3566BB0AD253F62FC70F07AEEE6357

 LOCK_TIME
11000000


So the 02 at the beginning indicates two inputs (TX_IN COUNT), and it's witness data is displayed at the end.