YouTube no longer considers 720p as high-definition...

[Pemalite]

Mr Puggsly said:

Pemalite said:

480P or 854x480 is 409,920 pixels.
720P or 1280x720 is 921,600 pixels.

If we keep both the same aspect ratios of 16:9 that is. 720P is just over twice the pixels of 480P.

16:9 480P was used on the WiiU gamepad and is used in many cheap low-end projectors and was even common in phones for a time.

Either-way... It places an importance of listing a whole resolution rather than "arbitrary" numbers like 480P if you are referring to anything other than 16:9 ratios.

That's a valid technical point. But a vast majority of SD TVs were not 16:9. Most content of the SD TV era wasn't designed for 16:9 either. Monitors during that period were generaly 4:3 as well.

In comparison, a vast a majority of HD TVs are 16:9. Hence, I went with 640x480 pixel count because it was common.

Honestly, that didn't really need explaining.

Some of the last CRT's were 16:9 widescreen and they weren't to bad... Although most were 720x480 "Enhanced Definition" and used a few tricks to stretch the image to 854x480.

Allot of Rear-Projection panels were the same.... Basically this was during the years just as we were starting to push towards Plasma/LCD panels.

480i however was in reference to 640x480 resolutions more often, although it is interlaced.

And you know me, I like a degree of accuracy in tech.

Mospeada21CA said:
720p was never HD, it was enhanced definition (ED).

The original (XBox) 2001, was capable of outputting at 720p on select titles, and they were glorious.

Not true.
720P is HD or "High Definition".
1080P is FHD or "Full High-Definition".

Enhanced Definition was progressive 480P and often represented resolutions like 720x480/854x480.