Sorry but I have a variety of issues with my LG WebOS and I was wondering how to fix it. I have a uj 6300 and os is LG WebOs 4.70.10

1. Is there any way to set up favorite channels using a computer using my LG account rather than on TV with the remote?

2. When I switch on my TV, it is always set to live tv and since I have no antenna it makes that annoying hissing sound? How can I set it up so that it go straight to Hulu etc.?

3. I find no way to cast Youtube directly from laptop to LG TV without using screen cast?