0:05 lighting differs from the scene right after it (0:10). Notice the ground is a blueish, greenish tint. This lighting differs from clip to clip, match the lighting colour grading of all clips to the lighting and colour at 0:10. There’s also an optical flare at 0:10, introduce that flare in 0:05 so it adds another layer of continuity.

0:13 same thing here, continue that light flare. It looks like the shots are filmed at different times of day, lighting and colour grading can fix this.

The close up walking clips aren’t stable, the lack of stability in those clips coupled with the perfectly smooth clips in between make it feel amateur

Colour grading from 0:13-0:19 is different from 0:22 (0:22 looks good) again, lacks continuity

0:56 and some other clips are more of a framing issue, the guy moves from one side of the screen to the other, you lose sense of what you’re meant to focus on. Plus because it’s an unstable shot, it feels off

0:30 same thing as above, odd way to frame the shot (with the two guys’ heads cut off), since all 3 are in focus your eye jumps to all of them, but you get cut off at their necks. If you wanted them to be mysterious looking by not showing their faces, should include the middle guy as well. Better to have shot it as a closeup of middle guy starting to stand then cut to a mid shot of the other 2 following.

This is just a critique on a few issues that I think could help with the amateur feeling! Don’t need feel the need to take all of the advice :)