Hello,
1. Unfortunately Blog page uses only Main Sidebar area. So you have to add your widgets there.
2. To open video in lightbox you have to search for some plugin.
3. You should set column width for image http://storage8.static.itmages.com/i/16/0725/h_1469430902_5248265_730d1a1f8d.png , also set column width for your other menu items.
Best regards,
Jack Richardson.















