Has anyone implemented these neat add ons sucessfully?

Automatically upload timelapses to Youtube
Send an email after a print finishes with a snapshot
( https://github.com/foosel/OctoPrint/...ful-Eventhooks)

I have been trying to get these working to finish off my install but whenever I modify the config.yam1 file the server becomes inaccesible and I get a 503 error on my webbrower if I access it locally or over the internet. I feel like I dont get the syntax correct for adding these changes but if anyone else has managed todo this and could shed some light it would be much appreciated.