Scientific Eye – Light & Reflection – a 19m 7s video:
A video lesson on Light (10m).
Bill Nye – Light & Colour – a 6m video clip.
Science in Action – Light – a 19m video.
Science in Action – Mirrors & Light – a 19m video.
Science in Action – Colour & Refraction – a 18m 36s video.
Scientific Eye – Seeing the Light – a 19m 18s video:
Scientific Eye – Colour – a 19m 6s video:
Scientific Eye: Seeing & Believing (15m).
Scientific Eye – Temperature & Heat – a 19m video:
KS3 Bitesize higher level – Conservation of Energy – a video covering Energy Transfer & Storage, Temperature & Thermal Energy and Conduction, Convection & Radiation.
Here are some Heat Energy Games.
KS3 Bitesize – Electricity & Magnetism – a foundation-level video covering Electrical Current in Circuits, Bar Magnets & Magnetic Fields and then Electromagnets & Electromagnets – a higher-level 5m 40s video.