What is html5 video fallback?

HTML5 has two types, for example, the opening and closing tags of video media embedd elements is processed by browsers which that don't support HTML5 media.May we can do the advantage to provide alternative fallback media for the browsers.

Element section supply two possible fallback options for video. In case, Browser supports HTML5 video used; otherwise, fallback option is used.

<video src="your video file path" controls>

<object data="flashplayer.swf" type="application/x-shockwave-flash">

<param value="flashplayer.swf" name="default name"/>

</object>

</video>

For me, it's the Browser compatibility. Since you're using HTML5, there are a lot of tags that is not working on the lower version of HTML and video tag is one of them.