These are part of Tsuburaya’s celebration of Ultraseven’s 55th anniversary: Brand new trailers for some of the show’s iconic episodes.

These were originally uploaded to the official Ultraman YouTube channel, but only the overall series trailer featured official English subtitles, so I thought it’d be fun to translate the individual episode ones.
DDLs here.

Translation: Flame + Official subs for show clips
Timing/Typesetting: cough drop and Earthly
QC: tokugifs

The trailers included are for:
Episode 3: Secret of the Lake
Episode 4: Max, Respond!
Episode 8: The Marked Town
Episodes 14 and 15: The Ultra Guard Goes West (Parts 1 and 2)
Episode 17: Underground! Go! Go! Go!
Episode 28: The 700 Kilometer Run
Episodes 39 and 40: The Seven Assassination Plan (Parts 1 and 2)
as well as the 55th anniversary commemoration video, which covers the overall series.

They’re all narrated by prolific voice actors: Most of them are by Tomokazu Seki (known to Ultra fans as Glenfire, along with many many other tokusatsu roles); The commemoration video is narrated by Megumi Hayashibara (Jessie/Musashi in Pokémon); The ones for 8 and 14/15 are narrated by Hiroki Tōchi; And the one for 39-40 is narrated by Mamoru Miyano (Ultraman Zero).

If nothing else, I seriously recommend the one for episode 28, that’s a genuine work of art.