There is also a VR (virtual reality) option for exploring the models as like you were there, and that’s just fantastic. By example, I’ve posted a 3D setting of my project “Last Breath”, a small abandonned town with a character walking on the street. I’ve tried the VR option with my phone, and that was very satisfying (and a bit creepy) seeing my project like that.
So, I think that Sketchfab is a very good way to show your 3D works. It’s more interesting that a simple video ( even if it’s a good way), because you can interact with the model itself, turn around like a statue in a Museum.