Go to your User account, click "Profile Settings" click the tab at the top "Channel and Profile Settings" Add your channel name and select "Yes", go to bottom of the page and click update.  Click here to view screen shots

Yes, your videos will show in the "Auto Play" section.

The best size to make your video covers is: W 1280px x H 720px.

Then channel banner needs to be 1920px in width and can be any height you like.

iPhone and iPad Open Safari browser and go to https://flickie.net, go to the bottom of the screen and click the icon with the arrow pointing up, then find the "Add to Home Screen" icon and click it, then click add. Now you should have the flickie icon on your mobile or ipad screen.  Click here to view image how to