In Blender, go to Edit > Preferences > Add-ons. Click "Install" in the top right corner and select the downloaded CineCast .zip file. Once installed, make sure to check the box next to the addon's name to enable it.

No, the CineCast Projector is built specifically for Cycles.

Single images, Image Sequences and Video files in the following formats: .mp4, .mov, .avi, .mkv, .webm, .png, .jpg, .jpeg, .exr, .hdr, .tiff, .tif, .tga.

This usually happens if there is an object (like a character, prop, or piece of furniture) standing between the projector lens and your target surface. The pins will accidentally snap to the obstacle instead of the wall. Simply hide any blocking objects in the viewport, click "Snap Pins" (or "Auto Correct Shape"), and then unhide your objects.

Yes. All included assets, patterns, and the 3D projector model are 100% royalty-free for both commercial and personal use.