MPlayer is best video player with amazing features.
You can play videos in app or on cast device.

Amazing Features :
* Play videos to ChromeCast
* Support subtitle or caption
* View Photos to ChromeCast
* Support multiple video codec
* Play Music to ChromeCast
* Open Docx to ChromeCast
* Open Pdf to ChromeCast
* Support many cast devices
* Build in Video Player
* Support multi video quality/resolution
* Support SRT files 
* Easy Navigation Video Player
* Smart TVs: Samsung, LG, Sony, Hisense, Xiaomi, Panasonic, etc.
* Xbox One and Xbox 360
* Amazon Fire TV and Cast to Fire Stick
* Roku, Roku Stick and Roku TVs
* and much more

Amazing video player support local videos Cast Player