diff --git a/docs/blog/posts/last-week-in-pony-032121.md b/docs/blog/posts/last-week-in-pony-032121.md
index 7c7bb381..8745510c 100644
--- a/docs/blog/posts/last-week-in-pony-032121.md
+++ b/docs/blog/posts/last-week-in-pony-032121.md
@@ -28,7 +28,7 @@ See the [release notes](https://github.com/ponylang/ponyup/releases/tag/0.6.3) f
 
 @mfelsche writes:
 
-We started our first session of implementing the [RoaringBitmap](https://www.roaringbitmap.org/) in Pony. We recorded the whole thing, where you can see me type. We didn't get much done, but covered quite a few pony basics: [The recording](https://sync-recordings.ponylang.io/roaring-bitmap/2021_03_18.mp4).
+We started our first session of implementing the [RoaringBitmap](https://www.roaringbitmap.org/) in Pony. We recorded the whole thing, where you can see me type. We didn't get much done, but covered quite a few pony basics: [The recording](https://vimeo.com/917360368).
 
 We are planning on doing another session next Thursday, March the 25th at 10 PM CET, where we lay some more groundwork and then branch out for working on it in parallel. So we gonna code and we gonna plan. Join our [Zulip Stream](https://ponylang.zulipchat.com/#narrow/stream/190363-projects/topic/RoaringBitmap) for more info!
 
diff --git a/docs/blog/posts/last-week-in-pony-032921.md b/docs/blog/posts/last-week-in-pony-032921.md
index 19c669ba..cb1e9e31 100644
--- a/docs/blog/posts/last-week-in-pony-032921.md
+++ b/docs/blog/posts/last-week-in-pony-032921.md
@@ -16,7 +16,7 @@ The 'Force declaration of FFI functions' RFC has entered final comment period. O
 
 - Audio from the [March 23, 2021](https://vimeo.com/916363625) Pony development sync call is available.
 
-- @mfelsche writes: Again we met and worked on our roaring bitmap implementation (baby-steps) but I tried to sneak in some valuable pony development knowledge. Give it a shot here if you missed the call: [https://sync-recordings.ponylang.io/roaring-bitmap/2021_03_25.mp4](https://sync-recordings.ponylang.io/roaring-bitmap/2021_03_25.mp4)
+- @mfelsche writes: Again we met and worked on our roaring bitmap implementation (baby-steps) but I tried to sneak in some valuable pony development knowledge. Give it a shot here if you missed the call: [https://vimeo.com/917360720](https://vimeo.com/917360720)
 
 - A new "with OpenSSL" builder has been added for use by projects that need a Pony builder image with OpenSSL. The new image includes OpenSSL1.1.1k. The existing builder with OpenSSL1.1.1g will be deprecated on a date after May 1st, 2021. After that date. it will stop receiving updates although, the previous versions of the builder will continue to exist.
 
diff --git a/docs/blog/posts/last-week-in-pony-041821.md b/docs/blog/posts/last-week-in-pony-041821.md
index 1c1379cc..46348d02 100644
--- a/docs/blog/posts/last-week-in-pony-041821.md
+++ b/docs/blog/posts/last-week-in-pony-041821.md
@@ -20,7 +20,7 @@ The supported version of FreeBSD has switched to 13.0 for ponyc and corral. The
 
 - @mfelsche writes:
 
-The Roaring pony folks did meet again and recorded their session: [https://sync-recordings.ponylang.io/roaring-bitmap/2021_04_13.mp4](https://sync-recordings.ponylang.io/roaring-bitmap/2021_04_13.mp4). This time we did some small code cleanup, detected a non-terminating ponycheck generator and we have been looking at ponybench, the benchmarking library from the pony stdlib.
+The Roaring pony folks did meet again and recorded their session: [https://vimeo.com/917360986](https://vimeo.com/917360986). This time we did some small code cleanup, detected a non-terminating ponycheck generator and we have been looking at ponybench, the benchmarking library from the pony stdlib.
 
 ---