Remove and replace old url for cdn.3speakcontent.co
We, recently at 3speak.tv we replaced cdn.3speakcontent.co with an ipfs url for video thumbnails created after Jan ~10th.
I noticed in numerous places below cdn.3speakcontent.co is hardcoded. I am going to need this hardcoded url replaced with the one inside the
image:  key in json_metadata. By default we put the new url as the first key in the image array. I believe that should be enough but I am also happy to store the thumbnail image url in another field so it can be added back to the image array. This issue creeped up when multiple users edited their posts resulting in broken thumbnails on hive.blog/peakd, etc.
Please let me know if further clarification is necessary.