How to play video from selected data in gridview?

Question

ASP.NET

Need to make it so that when an item in the gridview is selected in the video tag, the video from the selected field is played?
There is this code:

<video controls="controls" preload="auto"> 
<source type="video/mp4" src='<%# "videoDBv2.ashx?ID=" + Eval("  ")%>' />
</video>

What needs to be written in eval to make it work?

Answer 1

where is the code?