Starting from this video, new uploads will have the highest resolution of 1080p 60fps, except the "Video in past" series.
This bulb comes from a pen light bought from twelve dollar store in 2011, the push switch at the end of the light was not conducting, which would prevent the lamp from turning on so I disassembled it. This bulb is clearly a product of Philips because of the marking on the base, and I also found this on Philips lighting catalog (last checked in 2019).
The rating of this bulb is 1.2V 220mA. In this video it is powered by one 1.5 volts alkaline cell.