1 - it's depend from the format of your playlist, could you provide a link of this playlist ?
2 - You can host your own content, or build an xml playlist with your own thumbs or use the hqdefault thumbs of youtube
www.longtailvideo.com/support/jw-player/...-up-an-mrss-playlist
and the hq thumbs (360*480)
Code:
http://i2.ytimg.com/vi/VIDEO_ID/hqdefault.jpg
or
Code:
http://i2.ytimg.com/vi/VIDEO_ID/0.jpg
or you can try our host solution :
www.joomlarulez.com/faq/51-faq-video-joo...eo-joomlarulez-.html
3 - The module take the default thumb provide in the xml file from youtube (90x120) (I guess youtube take the hq one):
Code:
http://i.ytimg.com/vi/VIDEO_ID/default.jpg
or
Code:
http://i.ytimg.com/vi/VIDEO_ID/2.jpg
is also accessible different (in 90x120)
Code:
http://i2.ytimg.com/vi/VIDEO_ID/1.jpg
http://i2.ytimg.com/vi/VIDEO_ID/3.jpg
If you want a better resolution you have to follow the step 2