It's not open source, but Tumblr is a decent option if you want something fairly easy to setup. Additionally, it can look very professional with a good theme..

As others have already mentioned, Pixelfed is probably your best option for a FOSS solution to your problem.

The thing you're looking for is called an Input Method Editor. The only one I've ever used on Linux is Fcitx which I really liked. I haven't used it in a few years though.

This is the homepage for the current version.

My late grandmother loved Ancient Aliens except when they said anything Christian was aliens. When that happened she would get offended and yell at the television. Her religion was real, but all the other ones were aliens.

Odds are that the pilots themselves didn't see him and would have learned about the situation from air traffic control. It was late at night, there's a limited range of sight from a cockpit, and at least one of the pilots is going to be paying more attention to the pre-flight checklists than their surroundings. Additionally, even if they shutdown the engines it would still take time for them to fully stop. As for the footage being cut off, it's probably because that portion hasn't been (and probably won't ever be) released to the public. Ultimately, you're going to have to wait for the NTSB's report for more details.