1
00:00:01,000 --> 00:00:03,000
Ampersand: & and a raw & character

2
00:00:03,500 --> 00:00:06,000
Angle brackets: &lt;not a tag&gt; and <i>a real tag</i>

3
00:00:06,500 --> 00:00:09,000
Math: 3 < 5 > 1, unescaped

4
00:00:09,500 --> 00:00:12,000
Numeric entity: &#8212; and named: &mdash;