As I mentioned some time ago in Creating valid names with the id attribute, HTML 4.01 is pretty restrictive regarding what values are allowed for id attributes:

ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (“-“), underscores (“_”), colons (“:”), and periods (“.”).

Well, HTML5 changes that by allowing almost any value for the id attribute:

From HTML5 3.2.3.1 The id attribute:

The value must be unique amongst all the IDs in the element's home subtree and must contain at least one character. The value must not contain any space characters.

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Posted in HTML 5.

Nowadays, it is more or less the norm to use JavaScript to insert video content embedded in Flash into web pages. While it does work in the majority of cases, there are a couple of problems: it requires JavaScript and it requires Flash.

Some people block JavaScript, some block Flash, some block both, and some use platforms or user agents that do not support JavaScript and/or Flash. Like the iPhone and iPod Touch, for example. So to reach the largest possible number of people with your videos, you may want to look into the method described by Kroc Camen in Video for Everybody!.
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Posted in (X)HTML, HTML 5.