Right-click on video page, choose "view source". Look, about 26 lines down, for:
meta name="twitter:image" content=
Following "content=" will be a url, like;
Code:
http://media.startv.in/newstream/star/channelv/v_dil_dostii_dance/830/dil_dostii_dance_ep830.jpg
Cut "dil_dostii_dance_ep830.jpg" from the end of the url
Replace with;
lf_1000.mp4 (for 1000 quality)
lf_700.mp4 (for 700 quality)
lf_300.mp4 (for 300 quality)
Code:
http://media.startv.in/newstream/star/channelv/v_dil_dostii_dance/830/lf_1000.mp4
http://media.startv.in/newstream/star/channelv/v_dil_dostii_dance/830/lf_700.mp4
http://media.startv.in/newstream/star/channelv/v_dil_dostii_dance/830/lf_300.mp4