@Birdlady, I'm not referring to this particular video, as I do not click on anything from Breitbart and therefore haven't watched it.
The sites you mentioned all have publicly stated policies about disallowing incendiary, false, deliberately misleading, libelous, harmful, and similar types of posts on their platforms. YouTube, Twitter, Google, Instagram, Facebook and others are owned websites; they are not the public square, and as such they are not obligated to offer First Amendment Rights. Privately owned platforms can decide whether to allow people the opportunity to spout whatever claims they desire.
Similarly, webhosting services (GoDaddy and others) typically have certain standards and clauses written into their contracts, including the right to remove a site from their servers at their own discretion.