You may feel these symptoms first in your feet and then possibly in your shins: 1  Numbness, tingling and pain. 2  Unsteady when standing, walking. 3  Muscle weakness (including weak ankles) or cramps.
720HD is 1280 x 720 pixels per frame. The highest resolution that the DVD format can support is 720 x 480 pixels per frame for NTSC (or 720 x 576 pixels per frame for PAL), which is at best only 37.5% of the resolution of 720HD.
I do not know the exact resolution Blu-ray is capable of I do know that it often depends on the size of the disc, a DVD can hold 4.7-10 GB making 1080X1920 the best resolution for a dvd a blu-ray disc can hold 25-50 GB of data making 4K easily possible I would say the only thing threatening Blu-ray is streaming and that needs a fast internet ...