Computer:

 

Openshot https://www.openshot.org/

Easily approachable and lightweight. Suitable for the novice editor

 

DaVinci Resolve https://www.blackmagicdesign.com/products/davinciresolve

If you have previous experience editing with software such as Adobe Premiere, Sony Vegas, or Final Cut, you may want to consider choosing Resolve, which has more versatile features.

 

 

Mobile:

 

VN Video editor

Play store / Apple store