Clear at 1080p but not at 480p

[ejmillan]

I saw this other request for help from you.
Are they related?
If so, you can add that information here and avoid two threads dealing with the same issue.

Faster become more laggy!

Yeah, Actually I used Enscape for render my building videos and thats 1080p when I edit it in shotcut and make some video at 6x, some at 4x and I export it and become laggy, blurry and even I upload it on youtube and problem remains same! Help me!