How much do you need to study sign language to become good at it? 

0:00 Opening
0:06 Onomatopoeia, mimetic words, and sign language expressions
1:09 fingerspelling quick read
2:24 Sign language expression for dependent nouns
4:02 Do you need both hands when using sign language?
5:21 How much sign language can you learn to become good at it?
7:37 What I want to ask you to say