The following were created by me when I had the same question and found no answer. Copy the code into a text file, and name it exactly the same as your video file, but change the file extension to "nfo".
For example, if your video file is named:
Adventure Time - s01e07e08 - 4a - 4b - Ricardio the Heart Guy - Business Time.avi
Name your text file:
Adventure Time - s01e07e08 - 4a - 4b - Ricardio the Heart Guy - Business Time.nfo
Incidentally, the s01e07e08 is the proper way to title the episode for XBMC to recognize it properly. The data is typically drawn from IMDB, so I emulate the episode numbers from there in order to scrape the proper data.
http://www.imdb.com/title/tt1305826/episodes?season=1
Season 1 Episode 4a and 4b
aka Episode 7
http://www.imdb.com/title/tt1626280/
aka Episode 8
http://www.imdb.com/title/tt2237940/
Code:
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<episodedetails>
<title>Ricardio the Heart Guy</title>
<rating>7.7</rating>
<season>1</season>
<episode>7</episode>
<plot>When a Heart Guy named Ricardio comes to Candy Kingdom, Finn gets really jealous and finds a way to get him out of the Land of Ooo.</plot>
<credits>Bert Youn / Sean Jimenez</credits>
<director>Larry Leichliter / Nick Jennings</director>
<aired>2010-04-26</aired>
<epbookmark>0</epbookmark>
</episodedetails>
<episodedetails>
<title>Business Time</title>
<rating>8.0</rating>
<season>1</season>
<episode>8</episode>
<plot>When Finn and Jake discover a group of businessmen frozen in an iceberg, the duo thaws them and hires them to help with their adventures.</plot>
<credits>Luther McLaurin / Armen Mirzaian</credits>
<director>Larry Leichliter / Nick Jennings</director>
<aired>2010-04-26</aired>
<epbookmark>679</epbookmark>
</episodedetails>
Season 1 Episode 5a and 5b
aka Episode 9
http://www.imdb.com/title/tt2237954/
aka Episode 10
http://www.imdb.com/title/tt1685055/
Code:
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<episodedetails>
<title>My Two Favorite People</title>
<rating>8.0</rating>
<season>1</season>
<episode>9</episode>
<plot>Jake's plan to spend time with both Lady Rainicorn and Finn backfires.</plot>
<credits>Pendleton Ward / Kent Osborne</credits>
<director>Larry Leichliter / Nick Jennings</director>
<aired>2010-05-03</aired>
<epbookmark>0</epbookmark>
</episodedetails>
<episodedetails>
<title>Memories of Boom Boom Mountain</title>
<rating>7.6</rating>
<season>1</season>
<episode>10</episode>
<plot>Finn reflects on an upsetting experience in his past and pledges to help everyone in town, but his proves more difficult than imagined.</plot>
<credits>Bert Youn / Sean Jimenez</credits>
<director>Larry Leichliter / Nick Jennings</director>
<aired>2010-05-03</aired>
<epbookmark>679</epbookmark>
</episodedetails>
Season 3 Episode 10a and 10b
aka Episode 19
http://www.imdb.com/title/tt2119588/
aka Episode 20
http://www.imdb.com/title/tt2188997/
Code:
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<episodedetails>
<title>Holly Jolly Secrets Part I</title>
<rating>7.7</rating>
<season>3</season>
<episode>19</episode>
<plot>Finn and Jake stumble across the Ice King's video diary and look to uncover his secrets.</plot>
<credits>Mark Banker / Patrick McHale / Kent Osborne / Pendleton Ward</credits>
<director>Larry Leichliter / Nick Jennings</director>
<aired>2011-12-05</aired>
<epbookmark>0</epbookmark>
</episodedetails>
<episodedetails>
<title>Holly Jolly Secrets Part II</title>
<rating>7.5</rating>
<season>3</season>
<episode>20</episode>
<plot>Finn and Jake stumble across the Ice King's video diary and look to uncover his secrets.</plot>
<credits>Mark Banker / Patrick McHale / Kent Osborne / Pendleton Ward</credits>
<director>Larry Leichliter / Nick Jennings</director>
<aired>2011-12-05</aired>
<epbookmark>670</epbookmark>
</episodedetails>