You need a plugin for that.
If you don't mind for using a plugin, you can try this (attached)
Edit this line in the plguin as your needs:
Edit the xt_lvop_latest_videos and/or xt_lvop_latest_videos_video template as your needs. By default, it displays the thumbnail (the image uploaded from your xtmv_thumb custom thread fields).
If you want displaying the video (more than one video), you need to edit the Display Format of your xtmv_flv custom thread fields, something like this (depends on the player you use):
Call the flowplayer in your member_profile template (you can put it after the {$headerinclude} variable):
Then replace the {$GLOBALS['threadfields']['xtmv_thumb']['value']} variable with {$GLOBALS['threadfields']['xtmv_flv']['value']} in your xt_lvop_latest_videos_video template.