[bigalow]

yahoo loops their videos. you can use ffmpeg to trim (e.g. -ss or -to or -t) the original file down to the whatever size or length you want.

example:
ffmpeg -i originalfilename.ts -acodec copy -vcodec copy -ss 00:01:00 -to 02:00:00 newfilename.ts

-ss trim to start time
-t option specifies a duration - not an end time
-to in order to end at a specified time