Just to update , I restarted the iPhone and the videos all now appear normally. Not just a black screen and sound.
However after reboot , I lost all connectivity including Wi-Fi and mobile data. Meaning WiFi didn’t work for anything nor did using mobile data. Another reboot appeared to remedy this situation as toggling airplane mode didn’t help either.
What was also odd, is that during the time I lost internet and mobile connectivity if I attempted to compose an email it would type my characters from left to right instead of right to left. Using the space bar to go back wouldn’t work either. It would just go back to where the last character was at.