Hi, you can disable the light box effect for menu links like this:
1. Go to Appearance > Menus and select the top menu
2. Click on the Screen Options tab at the top right of the page
3. Place a check mark at CSS Classes under “Show advanced menu properties”
4. Scroll down to the Vimeo menu item at the bottom of the menu list
5. Open the menu item for editing and notice the CSS Classes field
6. Fill in nolightbox there and save the menu.
For the social links lower on the same page, it might be more difficult. Is that a page builder module? Does it have an option to add custom class names? If so, try adding nolightbox there…