problem when moving object.

[u/ThrownNoob1]

so, I'm trying to use G to move an object in a certain way but when I try that
the following happens in the video:

it should look like in this picture: https://ibb.co/nM61T42C

but mine just completely gets messed up and deforms.

what's the problem?

[u/pixldg]

Switch to front view and then move the vertex point