The sonic booms and the glowing lights are caused by huge serpents that hunt in fresh and salt water. When in fresh water, they can get their nutrition from the sediment. What you see in this video is not an anaconda but a different species altogether. Its like a worm or caecilian.
The glowing lights
The glowing lights are caused by their phosphorescent eyes. Reference for this is Bernard Heuvelmans book; On the track of unknown animals pages 350 & 352.
The sonic boom
The two creatures herd up their prey by frightening them with the sonic boom. They engorge their bodies with water and then use their muscles to shoot the water out creating a loud boom in the process.