If Youtube videos do not play reload the page, that's a Youtube bug.
Or maybe now, a few years later, it's a new bug ;-)

Felix Bernhardt - Die muntere Monika

Kroman Celik - Renforced (Original Mix)

Pfirter & Monoloc - Trucker 2 (Ascion rmx)

Virgil Enzinger & Submerge - Destroyer Of Worlds

Virgil Enzinger & Submerge - Spectrum (Tom Hades Remix)