A:AnswerThis TV does support Hulu. There are actually 4 bottoms on the remote for quicker access to some of the top streaming services and a Hulu is one of them.
A:AnswerYes, the VESA mount is 100mm x 100mm
https://files.bbystatic.com/ZWriXgzIl8%2F0IEBMMJuCog%3D%3D/NS-24DF310NA21_19-0794_MKTG_V1_final%2Bprint.pdf
A:AnswerThe TV doesn't include an Echo Dot in the box, it should be added to your Order when you purchase the TV. For more information about your Order, please call 1-888-237-8289