The flash you captured could likely be a man-made satellite flare or an astronomical phenomenon. If the flash was brief and bright, it might have been an Iridium flare. Iridium satellites, part of an older communication network, have antennas that can reflect sunlight, creating bright flares visible from Earth. These flares are transient and can become visible for just a few seconds before fading.
Alternatively, your observation could be a meteor, which appears as a flash due to a small rock or debris burning up in Earth’s atmosphere. Meteors, commonly known as shooting stars, can appear randomly across the sky, including near Orion.
Other possibilities include a reflection from a rotating satellite or an astronomical event like a supernova or variable star. To confirm the nature of the flash, consider the time, duration, and any repeating pattern of the phenomenon, and compare it with satellite tracking resources or astronomical event listings.