I went to a Google Play Store and installed this app for testing it:

PROS:

• Cinematic video and audio effects ( very cool, I like it already)
• Video formats compatible with the various social networks
• small size 38 MB
• very nice effects
• easy menu
• sound and sound effects are great

CONS:

• Application contains the adverts
• camera can lag or have troubles capturing movements ( needed stronger smartphone obviously)
• trouble with bright objects

I will keep this and try making my own videos with it, because it is really cool.