This is a video clip from a Japanese variety show Culture Scoop, who let Hiroshi Fujioka walk around and wander in the streets of Thailand. They are testing the Thai people to see how many will be able recognize him as the legendary Kamen Rider 1.
Although the video is untranslated, you can very much understand what's going on. Especially the on the second half of the segment wherein people begun to recognize him as Takeshi Hongo aka Kamen Rider 1. There's kinda a fan gathering of Kamen Rider fans from Thailand and they begun to sing "Let's Go!! Rider Kick," the original Kamen Rider's theme song.
Kudos to uaguruma sou of HJU for sharing this video.