Much depends on what you expect, how you use it and how the laptop has been treated.
An abused laptop (dropped/overheated/battery allowed to go completely flat) may well exhibit future problems. Some form of warranty - say 3 or 6 months - would give confidence in its quality. But this is also affected by what you pay.
The CPU isn't particularly fast but if you are only running a movie from DVD with nothing else running it should be watchable. Streaming is another matter as it is subject to many variables.
I would suggest that for general web browsing and occasional DVD movies it should be OK as far as the specification is concerned.