Which version of Photoshop and Lightroom are you using?
Which operating system are you using?
Are you getting any specific error message?
Please elaborate the work flow you are following.
Good Morning from Australia Mrinmay........PhotoshopCC2015....LightroomCC2015.21 [Version6.1].......Windows 7. i do exactly as the video says & nothing happens - Photoshop does not open. Normally if i send 1 from Lightroom for editing, no problem.
What is the file type you are using?
Have you tried with any other file type?
they are JPEGS. in the video he is highlighting a beach & a giraffe [not exactly what i want to to - but close] - he then goes to edit in-open as layers in PSD - works for him. many thanks for your help.