See interruptions on YouTube much? (5)
I believe the answer is:
loads
'youtube much?' is the definition.
I can't judge whether this definition defines the answer.
'see interruptions' is the wordplay.
'see' becomes 'lo' (archaic exclamation meaning 'look!').
'interruptions' becomes 'ads' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'lo'+'ads'='LOADS'
'on' is the link.
Can you help me to learn more?
(Other definitions for loads that I've seen before include "bags" , "Burdens, cargoes" , "A great many" , "a lot" , "Charges; plenty" .)