Recording software

[Welp]

Heya all I’ve been using the built in game bar to take snapshots of games (records the last 30 seconds)

It’s been working fine and all and the videos came out great but recently they’ve been coming out with large black bars on the sides and outlined with a thin white line on 2 sides of the video, it’s weird looking and what not.

Question is, what do you all use to record? And edit (I don’t have much skill in editing, just know how to cut videos)