I was Googling my own site and saw this in the search results:
I was rather annoyed to see that somebody's comment was being used for the video description, instead of the actual description ("Quick runthrough of what we have so far."):
How can I fix this problem? It's rather annoying and makes it look as though I wrote that comment as the description.
Best Answer
SEO works in mysterious ways when it comes to video descriptions on YouTube.
I can say this, from my own experience - It's best to write a very detailed and uber-targeted description containing links to authority sites to have google index your video with your description.
Also, try using the "fetch and render" option on the Google Search Console. You can try and change the description by submitting a page from your own blog, where the video appears as part of an article on the same subject.
This might trigger a change in the bot's crawl behaviour, resulting in your video being indexed with your own content instead of the comments.