It depends on how they are used. If you are reviewing or commenting on the movie or trailer in the text of the blog, it is likely to be defensible under fair use, providing the trailer itself was legally obtained.
Your original works, on your Wordpress blog, are automatically protected by copyright. Using others' copyright-protected works on your Wordpress blog requires an exemption in the law or permission from the copyright holder.
If it's your blog, you can. check my blog out - go to the bottom left hand side and you will see my copyright.
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The translation would be a derivative work, which would require a license from the copyright holder. Depending on the agreement made, the resulting translation may be considered a joint work of the author and the translator.Posting it on your blog would be distribution, which would require a license from the copyright holder.
You should have a copyright statement somewhere on each page (usually the footer). You can use the Creative Commons copyright according to the permissions you want to allow with the material that you publish on your blog. According to the CC website:Creative Commons is a nonprofit corporation dedicated to making it easier for people to share and build upon the work of others, consistent with the rules of copyright.
Unless you own the copyright, or you have a license, or qualify under the defense of "fair use", or other legal exception, then it is a copyright infringement to duplicate or publish works that belong to others.
You can try embedding a video file on the blog.
Aditya Tibrewala is running the blog adityasmoviereviews at blogspot and Dave Taylor is running the blog daveonfilm. Those are just two examples, there are many other movie reviewers that have a blog.
There is no way to share your works without some risk of infringement. Your best option is include a copyright notice in the image itself, as well as embedded in the metadata of the digital file.
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