plenty (ok maybe even most) of the really iconic ones in this clip, but plenty of fillers too (‘riffs’ that are in fact simply the chord structure of the song, underwhelming or overly complicated riffs that are actually either not that memorable or not that good, riffs that are in fact more properly defined as solos…)

Plenty of further reading/viewing available on this sort of thing. Just enter
"greatest guitar riffs" or "iconic guitar riffs" in your preferred search engine..

Marc