Social media users from public, private and NGO sectors are increasingly using social network sites (SNS) as part of their efforts. Usability maven Jakob Nielsen looks at the problems with outsourcing social media functions to platforms like YouTube, especially when linked from enterprise websites. The key risks involve lowering the usability of the primary site while also risking losing potential viewers (having less loyalty and losing value to search engines).
...there's no doubt about the everyday design implications of hosting any material on other sites. Don't just use the default template, and definitely don't assume that simply dumping stuff onto a popular SNS will automatically make you popular.