Delete video

Hi, I am trying to delete videos from Kodi. All sources say to change content to none, or press ‘c’ to call up content. Problem, I am using Kodi 17 (Krypton) on my Sony Smart TV (x940d) so I have no mouse, only the Sony remote control. I have highlighted the video(s) and pressed every button on the remote to see if I can get content. No luck. The video library is getting very cluttered.

Pressing the left arrow takes my to another screen with options but only to update library, nothing affecting content

Any help as to how I can delete videos from Kodi on my Android TV?

Thanks John