Set environment variable with space in Linux

You can also substitute special characters - use * as a wildcard to substitute for the space.

VIDEO="/home/mehrabib/m*o"

Try to quote VIDEO: cd "$VIDEO".

You should do

export VIDEO="/home/mehrabib/my video"

and to sum Dan's comments up also do

cd "$VIDEO"

which will expand to

cd "/home/mehrabib/my video"

again.

Personally, I've come to prefer the ${VIDEO} syntax.