AI video creator Pika Labs has released Pika 1.5, an upgraded model with new features.Pika 1.5 introduces 'Pikaffects,' which are visual effects that can make objects in a video melt, explode, or turn into cake.The new version also enhances photorealism and provides more camera control for users.Pika Labs faces competition in the AI video-making space but hopes Pikaffects will help carve out a distinct niche.