How to keep ratio while joing Tiktok clips

[snaptrap]

Does anyone know how to keep the ratio while joining multible ripped social media clips?

While VLC player plays the clips in the correct ration, all I get is this you can see in the screenshot.

I failed with Windows movie maker (lame I know) and Movavi.

(I blurred the image)

 

[FreeOnes_Adam]

Ripped social media clips? Is that even legal?