Airtime vs. LTX

mmhmm is a presentation app that takes your webcam feed and layers it on top of presentation slides. You control the look and feel of the screen. When you give a presentation on a live video call, mmhmm shares the webcam and images to your videoconferencing app as a “virtual camera.” You can also use mmhmm to record a lightweight video which saves to the cloud so your audience can watch anytime.

LTX is a type of open-source AI model that generates and edits synchronized video and audio content from text, image, or audio inputs. It helps developers, AI-native platforms, animation studios, VFX houses, and enterprise teams produce production-grade video without building infrastructure from scratch or relying on closed, cloud-only platforms that charge per generation. The latest model, LTX-2.5, is a 22-billion-parameter audio-video foundation model with open weights available on Hugging Face, where it has surpassed 33 million downloads across all versions.