To retrieve video from sql and embedd into video tag of html5

Hiiii
 
Using html5 i can play a video in website by assigning the path of video to source tag.. and am able to upload a video file in database(sql) also by bytes array...and can retrieve the video file i.e bytes array...but how fetch that value and embed to the video tag of the html5...
I found some code to bind the video to asp.net by using handler.ashx file....here if i need to bind to html5 how to do...
 
I tried by writing a code to upload to database in class file....i need to know how to call that function in javascript code....is my approach right?? or any other way to embedd video to the video tag
 

Thanks and Regards,
Divya.K