This video pits Kdenlive, Openshot and Shotcut against each other in terms of usability, render times and overall look and feel.

The links below are for channels that contain great tutorials for each editor:

Kdenlive - T.J. Free https://www.youtube.com/user/tjopen1

Openshot - Johnathan Thomas https://www.youtube.com/user/JonOomph

Interview with Jonathan Thomas on Destination Linux https://www.youtube.com/watch?v=e0PvlkzHvIM

Shotcut - Mr Eko https://www.youtube.com/channel/UCuQN51H4IrDGOm5CXKIsipg