What type of critters do I have

Hopefully you can tell from this video link. They seem to be on my inside Elm, bogie, Bottle Brush and Ming Arelia.

Any help is appreciated.

These could be fungus gnats. The larvae can damage roots in large numbers otherwise they’re not much of a problem. They usually show up when the soil stays too wet.

There are plenty of resources online with advice for dealing with them - here’s one that covers the basics: