Searching mods from pictures to make Minecraft Machinima.

Hi! I'm working on a new YouTube channel related to Machinima Minecraft, but I'm having trouble finding some mods that I need to create further content and story. I'm way behind when it comes to mods for minecraft, so I'd appreciate any help! The photos come from a video of one of the Polish YouTube creators that I found, but I have no contact with him, so it's rather hard to find out personally what these modifications might be, and anyway, the creators don't like to share such information. 1. "Painting" with own graphics previously made in photoshop. I don't know how it works - do we paste the URL of the image from some platform or do we need to upload it to minecraft. I noticed in this creator's video that this "block" is non-colliding and can be jumped over normally and can also be placed on anything, so it's not an image. 2. Custom items like grimace shake or other items that we can put in minecraft 3/4. Realistic characters like Grimace, Speakerman, SpongeBob, Barbie. I've seen such characters using Minecraft: Bedrock, but I know that there is also some modification for Java that allows the use of such models. If you know what mods this is, I will be very grateful for your help!