[help] Best video resolution on instagram

The best one is 1080x1350, from my experience because it takes a lot of space on the screen but you can do slides.

i thniks 1 * 1 better resulations

If your making reels, make it 9:16 and 1080x1920. For "posts", e.g posts with more than one picture/video, go for a 1:1 aspect ratio with any decent resolution, 1080 and above.

I like 4:5 or 1:1 ratios. If you're having trouble with resolution limitations you could what that other user recommended with Meta's business suite but it's kind of a pain.