Please capitalize where necessary: additional types of files may also be using the h261 file extension. if you are aware of any other file formats using the h261 file extension, please contact us so that we can update our information accordingly.
A: Additional types of files may also be using the H261 file extension. If you are aware of any other file formats using the H261 file extension, please contact us so that we can update our information accordingly.

Q: minimal no-load losses energy savings of up to 20%

A: Minimal no-load losses energy savings of up to 20%

Q: it was called by the chinese nam viet, meaning south viet, viet being the chinese generic term for the peoples to the south of the core region of china. note on the map below that the area of nam viet included what is now south china and the linguistic area of cantonese.
A: It was called by the Chinese Nam Viet, meaning South Viet, Viet being the Chinese generic term for the peoples to the south of the core region of China. Note on the map below that the area of Nam Viet included what is now South China and the linguistic area of Cantonese.

Problem: try to play these exciting games, and maybe you will not notice as you want to believe.
Can you repeat this sentence, but capitalize it?
Answer: Try to play these exciting games, and maybe you will not notice as you want to believe.

Text: the photographs were taken using an analogue camera with up to an eight minute exposure time.

Correct capitalization: The photographs were taken using an analogue camera with up to an eight minute exposure time.

Q: join twitter and start sending tweets

A:
Join Twitter and start sending tweets