Full four hours, this is really comprehensive and坑人, there are a lot of things I haven't seen before, absolutely not坑爹!
(Note: "坑人" can be translated as "deceptive" or "rip-off", and "坑爹" is an internet slang meaning "disappointing" or "not worth it". A more natural translation would be:
"It's a full four hours, very comprehensive, though some parts might be considered deceptive. There are many things I haven't seen before, and it's definitely worth it!")