According to the information released for the upcoming Tales of Zestiria the X second premiere screening, episodes 5 and 6 of Tales of Zestiria the X will have bits of Tales of Berseria.
When we say episode 5 and 6, we mean the ones numbered as "Episode #05 and #06." Technically, it will be the 6th and 7th episodes to be aired if you count the Episode #00 prologue.
In the information released for the second pre-screening event, it is mentioned that Tales of Berseria will somehow cross over with these two upcoming episodes.
We've already seen Velvet herself, the protagonist of Tales of Berseria, appear in Tales of Zestiria the X's opening theme. We'll finally find out how exactly she's tied to the story by these episodes.
Episode #05 and #06 of Tales of Zestiria the X will be shown at the upcoming second premiere screening this August 5, 2016 in select theaters in Japan. There will also be a cast and staff talk show, plus an information corner for the Tales of Berseria game. This latter part will be done at Cinema Mediage in Odaiba , and will also be shown as a live viewing in the other cinemas. Participating cinemas include TOHO Cinemas Umeda, TOHO Cinemas Nagoya Bay City, TOHO Cinemas Tenjin, T Joy Riverwalk Kitakyushu and ufotable Cinema. Tickets will be 2,500 Yen if you'll be at the Cinema Mediage one and it will be 2,000 Yen for all the other cinemas.
Included in the cast show are the voice actors of Velvet, Laphicet, Rokurou and Magilou along with the Director and the Producer of the Tales of Zestiria X anime. It will be an event that will make Tales of Zestiria the X and Tales of Berseria "cross" each other.
If we're following the actual release of the episodes in public, Episode #05 and #06 will be shown on August 7th and August 14th, which will be in good timing with the release of Tales of Berseria itself on August 18, 2016 in Japan.
The Tales of Zestiria the X anime (read as “the Cross”) is a TV series adaptation of Tales of Zestiria that was first announced during Tales of Festival 2015 as the “Tales of 20th Anniversary Animation”. The animation is done by ufotable. The first season aired during Summer 2016, with a second season confirmed for 2017. Its tagline is “The Journeys of the Shepherd go beyond Zestiria,” and shows hints of connections with Tales of Berseria. 
Tales of Berseria is the latest mothership title of the Tales of Series which was first announced during Tales of Festival 2015. The game was released for both the PS3 and PS4 on August 18, 2016 in Japan, January 24, 2017 in North America and January 27, 2017 in Europe for the PS4 and PC. The game features a female protagonist named Velvet and a theme of pirates and ships. It’s also confirmed as a distant prequel to Tales of Zestiria.
