Fragment of YouTube diatribe typical of one those in The Plot (3)
I believe the answer is:
bed
'plot' is the definition.
(bed is a kind of plot)
'fragment of youtube diatribe typical' is the wordplay.
'fragment of' says the answer is hidden in the clue (I've seen this in other clues).
'BED' is hidden within 'youtube diatribe typical'.
'of one those in the' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for bed that I've seen before include "One with flower, sleeper, in" , "Sleeping place" , "(Garden) plot" , "In which to place the body of flowers" , "might be laid here" .)