First time looking at this thread. I have a few videos...bad really by my standards...but a few. We are traveling to Chiapas and Tabasco Mexico in March. For the first time I'm going to be bringing my drone. I won't have much below water, but I do plan on getting more video from above.
This is Carpinte "Rio Verde" and Bartoni in Media Luna canals. Lots of fast moving very warm water:
This is Nosferatu labridens "yellow" with fry in Media Luna canals. This was just outside the recreation area of Media Luna. Lots of wide open spaces and very muddy bottoms. The fish hugged the banks with their fry: