Nope, that was in 5:15 from Quadrophenia. The solo started as some bubbly little runs on their '89 tour (with the Warwick Buzzard) and turned into a full-fledged solo when they took Quad on the road as a nearly rock theater performance in '96-'97. They played it in every show after that (I think the only exceptions were the Concert for New York, which was the last Who show Entwistle ever played, and 2 unplugged/acoustic benefit gigs in '99), and the solo got longer and more complex over time. That vid showed the solo pretty much at its peak - they only played a few more shows after that, and I don't think he added to it.
He also played a big solo with The John Entwistle Band during Shakin' All Over from '96-'02, bits of which borrowed from the 5:15 solo. This sometimes was done as a bass-drums duel with Steve Luongo.
The longest solos he ever played onstage with his Alembics (to the best of my knowledge) were at the end of The Who's Dreaming from the Waist, which got limited stage time from '75 through '79. He played it almost like on the album (Who by Numbers) with his Series 1 in '75-'76 (with Moonie on drums), but he developed it extensively on his Spyder in '79 (with Kenney Jones drumming, he had more room to stretch out).
