How to access a memory stick using a OTG cable? I have a OTG cable connected to my phone and a memory stick on the other end. My android phone is rooted and I have no idea how to find/access the files on my memory stick. How do I access files from my memory stick with my phone?

EDIT: Is it also possible to watch videos from the memory stick without moving it to the phone's storage?
You can access a memory stick via OTG cable if your phone supports it. See Compro1's answer to check if your phone supports OTG; you may need to specify the correct code / model in the USB Host Diagnostics site.

In case your phone supports OTG but does not support it directly, check out my answer which involves using USB OTG Helper.

As to your last question, YES. You can watch videos from the memory stick.