Camera Sequencer won't play when adding keyframes?

Studio Operators Composer 3D Scene Editing 3D Animation Sequencer Virtual Camera Unreal

 

Hi guys,

Been following Richard's tutorial on setting up camera sequencer: Using the camera sequencer | Virtual Production Unreal Engine & Aximmetry Tutorial - YouTube

However, I've run into a problem. I enabled the slate in all the nodes in my camera, and hit capture to create a keyframe, then moved on to the next point, hit capture again to create another keyframe. However, when I hit Space to play the sequence just created, nothing happened. My camera just stayed at the last point I've created the keyframe. I noticed that the yellow play line just snapped between my first and last keyframes when I hit Play instead of running from the first to the last key frames, and I saw no camera movement in my preview window.