[css-color-hdr] Initial value of dynamic-range-limit

[svgeesus]

I am also not convinced that the default value for high is appropriate. constrained-high seems like a more reasonable default.

Originally posted by @smfr in WebKit/standards-positions#312 (comment)

[svgeesus]

I am also not convinced that the default value for high is appropriate. constrained-high seems like a more reasonable default.

All browsers display HDR video using high as the default, so this would be a substantial change in existing behavior, which would require coordination with every site that delivers HDR video.

There does exist some HDR content that is "just too bright", and doesn't coexist well with SDR content at all. That's a "the content is bad" problem, and solving it via a default of constrained-high has the negative effect of further-enabling bad HDR content, and penalizing good HDR content.

Originally posted by @ccameron-chromium in WebKit/standards-positions#312 (comment)