Noob Question regarding Render resolutions!


I’ve been rendering a bunch of stuff recently and noticed that for some of my ‘heavier’ renders, the final video isn’t in its full resolution, as in, its slightly blurry.
I’ve set the resolution to 1920x1080 at 100%, frame rate at 60, but some videos still come out ‘not clear’. Any tips, or a reason why my larger renders seem to be of slightly less quality?


Note; Im running a 1920x1080 screen, so shouldn’t be any problem there. Also using the ‘MPEG’ format, which turns into a (.dvd) file. Any tips or tricks to improve render quality would be appreciated! No need to worry about rendering time either!