Here is a video of Takbeer from Madinah Al-Munwawah Masjid. Saying Takbeer in the first days of Dhul-Hijjah is a very highly recommended Sunnah of Prophet Sallallahu Alaihi Wasallam (peace and blessings of Allah be upon him). Fill your day with Takbeer during these days. (Increase the volume to listen). Please share with others.