Builder.kt

val accessToken : AccessToken = 
            AccessToken(
                // String token you saved from Pages list
                token,
                // replace it by your applicationId
                "com.app.packagename",
                // ID you saved from Pages list
                pageId,
                // The same permissions list we used for Login flow at point 4
                listOf("public_profile", "pages_manage_posts"), 
                null,
                null,
                AccessToken.getCurrentAccessToken()?.source,
                AccessToken.getCurrentAccessToken()?.expires,
                AccessToken.getCurrentAccessToken()?.lastRefresh,
                null
            )
        }
    }

AccessToken.setCurrentAccessToken(accessToken)

val shareBuilder = ShareVideo.Builder()
    .setLocalUrl(localVideoFile.toUri())

val videoContentBuilder = ShareVideoContent.Builder()
    .setContentDescription("Post desctiption here")
    .setContentTitle("Post title here")
    .setVideo(shareBuilder.build())