Sending video to wall error about rio HOT 1 OPEN

Not sure whether this is still relevant for you after such a long time, but it is for me, so I'm documenting what I figured out.
Fixed in blauzaaan@55337fa

I'm getting errors during npm run install-server:

> [email protected] postinstall /home/pi/rio/rio-server/node_modules/youtube-dl
> node ./scripts/download.js

Error: Could not find download link in https://rg3.github.io/youtube-dl/download.html
...

See: przemyslawpluta/node-youtube-dl#162
It's fixed later versions, so change rio-server/package.json:
"youtube-dl": "1.11.0" --> "youtube-dl": "1.13.1"

(newer versions seem to depend on a package which require newer node versions, so not using those for now)

However, with the video I selected, I got

Error: Command failed: /home/pi/rio/rio-server/node_modules/youtube-dl/bin/youtube-dl --dump-json --format=17 http://www.youtube.com/watch?v=MLFWLJSPN7I
ERROR: requested format not available

Therefore I additionally changed the format in rio-server/inputs/video-worker.js:

//    var video = youtubedl(url, ['--format=17']); // 176 x 144 @ 12fps
    var video = youtubedl(url, ['--format=worst']); // changed as at least some videos are not available in format 17

If considering switching to youtube-dl-exec, remember to not only in package.json, but also in inputs/video-worker.js:

const youtubedl = require('youtube-dl');

from rio.