For this, you'll have to modify the theme to reposition or enlarge them.
You can also adjust the CSS using the custom html/css page in the ACP.
I don't know where I should address this...
/photo/1 isn't needed, so if you want it to embed, just remove that bit and it should still work, submit an issue on the devs github to adjust the code to strip out photo/1 automatically if possible.
@a_5mith I did, but I can't expect the user to understand that. He just complains that it's not working.