We live in an age where the <video> tag is widely supported and reliable. What's the argument for hosting on youtube, really? Something that won't make a judge

We live in an age where the <video> tag is widely supported and reliable. What's the argument for hosting on youtube, really? Something that won't make a judge laugh, I mean, not "but what if I get eleventy million views and my $4/month vps can't handle it?" What are these people bringing to trial? (Trying to bring to trial.)