The first one obviously needs medication, and will be ignored. The second one - depending on the specificity of the threat - a request to take the video down or a police visit.
I love the idea of free speech to explore the space of possible ideas even against the current flow. But now we have easy filter bubbles and are missing effective mechanism pushing towards consensus. I have a hard seeing how it will not end with violence when hate speech and other surreal propaganda doesn't have consequences. But yes, we haven't found a good solution for that, yet.
The situation here in germany is even more... "funny". Gov decided to ban hate-speech, but the decision per individual case isn't up to some judge, but has to be done by the platform or face fines. Yeah, so far I prefer the current US way of not doing business with assholes.
What was the direct/specific threat that Gab refused to take down?