Need help from the photography fans.

[kentiiboii]

My uncle has asked me to convert and edit some wedding videos he has taken so he can use them on his tv.

He says they need converting from avi to jpeg (maybe other way round).

He also says he'd like the videos to be brightened up a little bit.

Can anyone give me some advice on what programmes are best to use for each. Dont want anything thats too complicated as its not something ive majorly played around with before.

Thanks in advance.