The second trailer introduces Unmei Sensen Liddle-Light, an anime film from director Chiharu Ouji, who, according to the description of the video, previously directed the film Hikari no Yosuga, though no mention of that film exists online.
The Toei Film YouTube channel uploaded two mysterious trailers earlier in the day for two previously unannounced anime films that are scheduled to be released (presumably, theatrically) in 2022 from unknown directors.
The first trailer reveals Soundback Kanade no Ishi, an anime film from first-time director Hitomi Saito about a group of teens building a robot.