Read more tags don't work with vieo portfolio page

With your help, I removed the "go to post" button on my video portfolio pages. However, when there is too much text, it cuts off. Is there any way I can still use read more or learn more tags for this? Any other solutions would be very welcome. Thanks very much for your help!

http://www.jazzskills.co.uk/jazz-piano-greats-2/