Opening video's link is no more causes "Access denied" message from VK. The trouble was because VK is no (more) supports links to videos from posts like https://vk.com/video45882735_170857425 but links like that https://vk.com/wall45882735_182108?z=video45882735_170857425 are supported.
JS was slightly polished.
Merge pull request #7 from quasiyoke/master

Videos' URLs were fixed
Merge pull request #1 from KonishchevDmitry/master

vkfeed update from master