踊ってみた (odotte mita) basically means "tried dancing". This is a very popular hobby in Japan and all over the world. Many people will upload videos of them dancing to a J-POP/Vocaloid song and post it on YouTube and NicoNicoDouga. There are over a million videos of 踊ってみた! ! ! I have tried this before and it is very fun~! Many people will go really far making sure that there videos are over the top by editing a lot, cosplaying and dressing up like they usually do in the music video and everything else! I find this really interesting which makes it really fun to watch ^_^ I will show you guys a few videos of 踊ってみた !
These are really popular users and videos on the topic 踊ってみた ! ! ! ^_^
If you really enjoy these videos you can follow them on YouTube by using searching the username under the video you have watched. ^_^
Thank you for reading~!! ^_^