Considering that the Canadian charter of rights and freedoms wasn't even in the constitution until 1982 (and up until then the constitution was controlled by the British parliament), I have no clue what he's on about with it being suspended in the 70s.
Incidentally, that (the charter being put into the constitution and the constitution being put under Canadian control) happened during Pierre Trudeau's term.
There's also the notwithstanding clause in the charter, which allows for the government to temporarily (for up to 5 years, subject to renewal) pass bills violating some of the charter rights so long as they declare they are doing so, but Pierre Trudeau, and Justin Trudeau, and in fact the federal legislature as a whole, have never used it.
Edit: Ah, someone else pointed out that he's talking about Trudeau invoking the war measures act... that didn't implicate any constitutional rights, because there basically weren't any. There was a bill of rights and freedoms at the time, but that was a normal law not constitutional, and apparently exceptions had been passed for the war measures act...