The UFC periodically publishes - for a limited period - multiple complete free fights featuring fighters prominent on upcoming cards. Saturday's UFC on ESPN 19 is headlined by Jack Hermansson vs. Marvin Vettori. These are the free fights:
Jack Hermansson vs Gerald Meerschaert
https://www.youtube.com/watch?v=67GI3z95zMA
Marvin Vettori vs. Karl Roberson
https://www.youtube.com/watch?v=O_XdoYH6Gls&feature=emb_title