Here are some of mine - I have a bunch more, just no videos/pictures of them.
1957 El Capitan (coming at you) - all Lionel Consist:
The Sarah Express (project I did with my daughter):
C&O Consist (Lionel E-8s pulling MTH Cars) with many more consists at the station:
Chessie Steam Special (Lionel Legacy T-1 with MTH and Williams Cars):
Union Pacific (All Weaver except the Aux Tender which is MTH):