This is a pretty cool article on the edits:
http://lostmedia.wikia.com/wiki/The_Land_Before_Time_%28Original_Uncut_Version%29
And here are some very brief clips of interest:
http://www.youtube.com/watch?v=szhxWA9zrFg
http://www.youtube.com/watch?v=UOYYwGytRJs
http://www.youtube.com/watch?v=836yMvuweOQ
http://www.youtube.com/watch?v=g_M1-R_AO3c
The links to the sources in the description seem to be higher quality, however. I don't know that any of these were in the uncut version, and I kind of doubt it.