@soothing_helper76034 Those red "?" icons you've circled indicate missing or broken links to video files. Relink them to the correct folder, and it should play properly
Thanks for reaching out and sorry to hear you’re running into this issue. To better understand what’s going wrong, could you please share a few more details?
Your OS and exact Photoshop version
The video file format and codec you’re using
Whether the video is embedded or linked in the mockup