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dwcroninFlag for United States of America

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html5 & chrome

how do i make html5 work in chrome?  i'm using ubuntu 16.04 if that matters.
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David Favor
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Add context to your question.

If you mean render HTML5 in Chrome, there's no way to disable HTML5 rendering.

If you're running Chrome + visit a site serving HTML5 content, then Chrome will render the content.

Seems like there might be some question behind your question.
just open the page in chrome, it will work :)

* make sure extension is htm or html...
To expand a bit further:
Begin your HTML with a DOCTYPE declaration of HTML.  Here is a bit of HTML5 compliant base code:
<!DOCTYPE html>
<html>
<head>
<title>HTML5 Compliant Site</title>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>

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In HTML5 there is only one DOCTYPE, that is what you see on line 1 of the above code.  If you are new to coding, you can use W3 Schools to get started.  The site is here: https://www.w3schools.com/html/default.asp
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ASKER

HainKurt" unfortunately - no it doesn't :(
Jim Riddles:  I worked as a coder for 6 years but it was c-type coding.  no internet.  i'm a physicist.  they needed math skills (i'm not
     bragging,  it was trigonometry...)
David Favor: i think i explained it poorly again.  see the attached.
html5_problems.png
ok! your question is really poorly worded...

you should ask:

I am using ubuntu
I have XXXXX browser
When I try to open some videos on youtube, it does not show and I am getting this error
- see screenshot
"Your browser does not currently recognize any of the video formats available"

what should I do to resolve this issue?
now, what is your browser?
what is your operating system?
did you update browser to the latest?
are you using any addon / blocker on browser?
Post your browser version string.

My guess is you're using a browser so old, it can't understand something like... high profile in an h.264 video stream.

When I visit https://www.youtube.com/watch?v=ri97Sk8Gw3s - video plays fine for me.

I'm using Chrome Version 60.0.3112.90 (Official Build) (64-bit) which is latest out of Chrome's stable channel.
Oh... Be sure + check your YouTube settings too.

If you'd like YouTube videos to play in all cases, set Quality == Auto.

If you force Quality == 480 (as an example), it's anyone's guess what might occur from video to video.

Auto is your friend.
I just scrapped a copy of your video out of YouTube + looks like the Auto version pointed to a video transcoded with profile=baseline, so I'm guessing it's you're YouTube settings, rather than browser version... because...

With profile=baseline, videos should play on any device, even very old cellphones.
i'm using  ubuntu 16.04.  I'll try to update everything.  that's something I easily could have missed.  I heard there is a new version of my os out.  i'll look into it.
my-computer.png
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David Favor
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Do you know how to open the developer console?  If so, open the console and refresh the page, and see if there are any errors.  If so, post those errors here.
It seems like you are likely missing the required codecs.  Try the following command, or alternatively use your package manager to install the package.
sudo apt-get install ubuntu-restricted-extras

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Thank you all for the help.  I opened firefox and i don't get errors.