[Ashley V]

I think if you don't check the box to keep you logged in, it will kick you out after a certain time span of inactivity. If you don't want to stay logged in even if you check the box, just make sure you log out before you leave your computer.

There is a spell check on YT. When you are typing your reply, it should be above the box where the smilies are. It looks like a check mark with ABC written above it.