Where to find video tutorials for Touch Forms?
The best place to start is our official YouTube Channel
http://www.youtube.com/touchforms

Here are direct links to a few to get you started:

Update Form Properties and Response Email
http://youtu.be/yiC4OKtENjU

Checking out the form response email
http://youtu.be/wMnQFFyrW9k

Specify web form fields as mandatory - Touch Forms App
http://youtu.be/No2_D581y_Y