Hello, everyone, apparently there's a workprint of the movie leaked online filled with storyboard and early pencil tests mixed with voiceovers of the cast, and can be downloaded from a torrent (see here). However, to safe us the trouble, a YouTube user uploaded videos from this workprint. I am not positively sure that they were featured on the Laserdisc, but I know for certain they were not on the 2003 DVD or the 2011 Blu-Ray editions. Other than that, it's basically the finalized version of the movie but with scenes in different order most notably Simba's argument with Nala about returning home and the hyenas complaining to Scar about food happening before Scar summons Sarabi, and different lines.
(Note: Using the YouTube link the forum has would have took up so much shape so I just made them clickable links.)
https://www.youtube.com/watch?v=6iznJf8KZnY ("Circle of Life")
https://www.youtube.com/watch?v=B1i3c8kSycA ("I Just Can't Wait to Be King")
https://www.youtube.com/watch?v=7AaCsPAV3HA ("Be Prepared")
https://www.youtube.com/watch?v=EA8ODZAtsu4 ("Stampede")
https://www.youtube.com/watch?v=t5fyGO2YczY ("Can You Feel the Love Tonight") - Noticeably, there are different lyrics for the solo parts of Simba and Nala, and the Laserdisc never made seem like the Simba/Nala and Timon/Pumbaa demo versions seem like one continuous song.
https://www.youtube.com/watch?v=ajd16gEk6dY (Mufasa's ghost) - Interestingly, the argument scene between Simba and Nala was actually placed before the CYFTLT sequence (if you download the workprint torrent), and there are early animation tests for adult Simba who had a different design in the first half of the video.
https://www.youtube.com/watch?v=9KW4UnT1G8Y ("Battle of Pride Rock")