How to play video in visualforce from attachment

So we have developed many data driven pages but when it comes to multimedia then many of us didn't worked on it much. We are thing "Ok its just a video or a image I will display it by getting its path" but the problem arise when its(the MIME file) is an attachment. Attachments are stored in database unlikely if compared from static resource which has a direct access URL. So how can I display a multimedia file if its type is BLOB.

The answer is here, we can use <object> tag or we can have <video> tag of HTML5.
for <object> tag, here the {!crwAtt.id} is Attachment object.
hor <video> tag, remember to add "docType="html-5.0"" to page.