J. P. Gilliver (John) wrote:
In message , BillAhearn

I loved that video which is designed for test screenshots!
https://www.youtube.com/watch?v=KSFgolB7HHE

Well, it isn't _designed_ for that purpose! It's just a collection of TV
test cards.

I had to turn off the sound though which you'll know why!
My monitor is 1680x1050 and an normal final result is 845x904.

You mean, after you've done a PrtScn from normal browser and cropped to
the size of the rectangle the video part occupies, it comes out at
845×904? That's more than most of the videos I _suspect_ you'll be
copying from (though wouldn't for the test card one as that's 1280×720).

How can I upload the test screenshots to you?

Put them on any picture-sharing site, or your own website, and post the
relevant URL. But really, I wanted _you_ to check: capture (from the
same test card, obviously) in both full-screen and not, and look at the
various gratings in the images; note which gratings you can see the
individual black and white lines, and which just look like a grey block.
Look at your full-screen and not-full-screen captured images at the same
size (such as full screen): do you get more gratings and fewer grey
blocks in the full-screen capture? If so, it's worth doing (for that
video anyway); if not, it isn't. Tell us what you decide.

A video presented like this, has low resolution to begin with. Resizing
to 1680x1050 doesn't give any extra information to work with. The video is
smaller than the screen, and full screen won't help the actual results.

160 mp4 256x144 DASH video 108k , avc1.4d400b, 25fps, video only

Whereas this one, being "larger" than the OPs screen, can profitably
be resized to full screen before PRTSCN. There is "resolution to be
harvested", so making the video display full screen at 1680x1050
is helping.

137 mp4 1920x1080 DASH video 5093k , avc1.640028, 25fps, video only

Youtube would normally present in some "best" format, which
isn't actually maximum resolution, but includes both video and sound.

22 mp4 1280x720 hd720 , avc1.64001F, mp4a.40.2@192k (best)

If that one was shown at 1280x720, you're getting all the pixels,
and making it larger than that (1680x1050) isn't really helping
all that much.

If right-clicking on an Adobe Flash video, the "Stats for Nerds"
option may show the native resolution of the video. I don't know
if HTML5 based videos have "Stats for Nerds" as an available feature
or not. Youtube prefers HTML5 today, and it may be harder to
convince them to use FLV (flash) instead.

Paul