Can’t understand, when you miss it on TV (4,2,3)

'can't understand when you' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'miss it on tv' is the wordplay.
'miss' becomes 'fail' (failing is a kind of missing).
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'on' means one lot of letters go next to another.
'tv' becomes 'tose' (I can't explain this - if you can you should believe this answer much more).
'e' put after 'tose' is 'tosee'.
'fail'+'tosee'='FAIL TO SEE'

Can you help me to learn more?