I have a lot of thoughts, I worked on that project back in 2015. The whole situtation is a complicated mess. First off, that guy in the video comes across hella ignorant. He says something about the "fake" Wet'suwet'en. Trying to take away their identity is fucking retarded. It's a real First Nation group, even the ones protesting. What he doesn't realize is that the Wet'suwet'en are broken up into five smaller clans, each with their own territory:
Gilseyhu (Also known as Uni'stoten)
Laksilyu
Gitdumden
Laksamshu
Tsayu
The Uni'stoten have been adamant that they do not want the pipeline to go through their land. Unfortunately, for them, the rest of the Wet'suwet'en do. When I was in the region all five groups had agreed that they would allow the cultural and environmental impact assessments to go through but the Uni'stoten decided not to allow us into their territory and set up a blockade. They got a lot of worldwide attention so SJW from all over came to help out. Things got out of hand. Work trucks were vandalized, workers were harassed in the local towns we worked out of, they went as far as loosing the lug nuts on the tires of our work trucks so we had to check that each morning. Then a helicopter was surrounded by a group of protesters who tried to hold it captive with machetes. This was going on long before I got there so when I was there they had us set up working with a gang of people. There were Wet'suwet'en elders with us the entire time and all the bear monitors/medics were hired from Gitdumden who ran a company called Get um done, or something like that. We also had to have security with us at all times - usually ex rcmp or military dudes who were contracted to be with us. We were not allowed to go into the Uni'stoten territory which is called dark house. That was off limits. Last I heard I think Gitdumden is now against the pipeline, maybe they always were but were more friendly when it was just the environmental assessment going on.
Were those artifacts planted? I wouldn't doubt it, I wouldn't doubt their legitimacy either. This dude in the video can state that they were found were a site isn't expected but that happens all the time in the real world. The archaeology that took place was shotty at the best of times. One company held the permit and contracted out to about 20 or so other firms so the quality of the archaeological work definitely varied. I won't speak to the legitimacy of the artifacts.