I'm surprised because, as I said, the Liberal cause in the U.S. killed a very similar pipeline, and they're generally opposed to such projects.
People provide oversight through organizations that operate outside of the government (NGOs such as Sierra Club, Tread Lightly, First Nations, etc.) and independently review projects. Those same organizations and their members work to inform the general public about the projects and their impact. Independent people produced those youtube videos you linked, and at least a few of the pipeline workers will give a damn if there's an accident. If the pipeline goes, NGOs may play a crucial roll in guiding the project towards a safer plan, and making sure the standards are met over the long term.
It won't be easy, and there's no assurance of success, but what's the alternative? Pete, you strike me as exactly the kind of person that could be a strong, effective voice from your community. You're smart, have a construction background, can easily sniff out BS, and you live in the affected area. It's obvious you care about the project, and this is something that'll affect generations of Canadians. It's worth your time.
That will always happen, but it doesn't mean people shouldn't try to limit the hazards and damage.