The little ones are squirrel monkeys and the black ones are are I think they said black fox monkeys. The kissy monkey is a baby named Hikari. Hikaris mom died if I hear right. That some of what I caught while half listening. My Japanese is terrible.
Their hands feel very soft and I don't think their nails are sharp at all. Once, I was trying to feed one of the black lemurs (I think it could've been Zorori) got angry that one of the squirrel monkeys took a raisin and it scratched up my arm when trying to scare it away. (You can see one screaming and clawing at the wooden fence earlier in the video.) It was obvious that it wasn't trying to hurt me, though. The squirrel monkeys kind of felt like soft pillows.
You can turn on auto-translate for this zoo's videos. It's not perfect but you get a very good idea of what they are saying. Click on "CC" at the bottom of the screen, then click the gear symbol/settings next to it. Choose subtitles/CC, then auto-translate, then choose English. It makes watching the videos so much better because the keepers are quite funny.