Update video_mode.py

[magicse]

Added support for video files in MTS format

[semjon00]

Hello, thank you for contributing!
Did you test that it works with your video(s)?
There is "suffix.lower" in the commit that should be "suffix.lower()" (happens two times).

If this is addressed and code otherwise works I am happy to merge this :)

[magicse]

Yes it wotk. I'm currently calculating the depthmap for my videos. thank You.

[magicse]

suffix.lower()

It need for all - "if suffix.lower()" to avoid case sensitivity. Because sometime suffix could be like mts or MTS or MP4 or mp4 ))

[semjon00]

Merged :)

@magicse There are more things that can be improved in video generation. I would be glad if you submit more code with improvements.