Add a video tutorial for setting up environment and running nodes locally using BDLS

## WHAT
SSIA

## WHY
To make the onboarding of new contributors easier. 

## HOW
Following either [cloud setup](https://github.com/BDLS-bft/experiment-guide/blob/main/tutorials/google-cloud-vm.md) or [local setup](https://github.com/BDLS-bft/experiment-guide/blob/main/docs/getting-started-nanobash.md) guide. 