迅速なご回答誠にありがとうございます。
大変恐縮なのですが、変更するSRC_URIの記載場所はどのようにして
確認すればよいかをご教示いただくことは可能でしょうか？

.bbのレシピなどを確認しているのですが同様の拡張子が多く該当箇所の
特定が知識不足もありなかなか難しいのが現状です。

迅速かつ詳細なご回答ありがとうございます。
危うく直接書き換えてしまうところでした。

ご教示いただいた方法で変更したうえで再度
bitbake core-image-westonの実行をしてみます。

何度も申し訳ございません。
お陰様で上記のエラーは解消したのですが同じようなエラーが発生してしまいました。

こちらもアクセス先が変更されたのでしょうか？
調べているのですがなかなか情報が見つからない状態です。

たびたび恐縮ですがお力添えいただけましたら幸いです。
以下実行時のログです。
bitbake core-image-weston
Loading cache: 100% |############################################| Time: 0:00:01
Loaded 3036 entries from dependency cache.
Parsing recipes: 100% |##########################################| Time: 0:00:01
Parsing of 2181 .bb files complete (2180 cached, 1 parsed). 3036 targets, 268 skipped, 7 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION = "1.36.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "universal"
TARGET_SYS = "arm-poky-linux-gnueabi"
MACHINE = "aprzg0a"
DISTRO = "poky"
DISTRO_VERSION = "2.4.2"
TUNE_FEATURES = "arm armv7ve vfp neon callconvention-hard cortexa7"
TARGET_FPU = "hard"
SOC_FAMILY = "rzg1:r8a7745"
meta
meta-poky
meta-yocto-bsp
meta-rzg1
meta-linaro-toolchain
meta-optee
meta-oe
meta-multimedia
meta-python
meta-networking
meta-qt5
common
qt-hmi-demo = "<unknown>:<unknown>"

Initialising tasks: 100% |#######################################| Time: 0:00:16
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
WARNING: demo-videos-0.1-r0 do_fetch: Failed to fetch URL http://www.renesas.com/jp/ja/img/products/media/auto-j/microcontrollers-..., attempting MIRRORS if available
ERROR: demo-videos-0.1-r0 do_fetch: Fetcher failure: Fetch command export DBUS_SESSION_BUS_ADDRESS="unix:abstract=/tmp/dbus-R6f1SF5G7X"; export SSH_AUTH_SOCK="/run/user/1000/keyring/ssh"; export PATH="/home/guest/user_work/build/tmp/sysroots-uninative/x86_64-linux/usr/bin:/home/guest/user_work/poky/scripts:/home/guest/user_work/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/demo-videos/0.1-r0/recipe-sysroot-native/usr/bin/arm-poky-linux-gnueabi:/home/guest/user_work/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/demo-videos/0.1-r0/recipe-sysroot/usr/bin/crossscripts:/home/guest/user_work/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/demo-videos/0.1-r0/recipe-sysroot-native/usr/sbin:/home/guest/user_work/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/demo-videos/0.1-r0/recipe-sysroot-native/usr/bin:/home/guest/user_work/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/demo-videos/0.1-r0/recipe-sysroot-native/sbin:/home/guest/user_work/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/demo-videos/0.1-r0/recipe-sysroot-native/bin:/home/guest/user_work/poky/bitbake/bin:/home/guest/user_work/build/tmp/hosttools"; export HOME="/home/guest"; /usr/bin/env wget -t 2 -T 30 -nv --passive-ftp --no-check-certificate -P /home/guest/user_work/build/downloads 'http://www.renesas.com/jp/ja/img/products/media/auto-j/microcontrollers-... --progress=dot -v failed with exit code 4, output:
--2021-02-02 22:23:59-- http://www.renesas.com/jp/ja/img/products/media/auto-j/microcontrollers-...
Resolving www.renesas.com (www.renesas.com)... 23.9.173.129
Connecting to www.renesas.com (www.renesas.com)|23.9.173.129|:80... connected.
HTTP request sent, awaiting response... Read error (Connection timed out) in headers.
Retrying.

--2021-02-02 22:24:30-- (try: 2) http://www.renesas.com/jp/ja/img/products/media/auto-j/microcontrollers-...
Connecting to www.renesas.com (www.renesas.com)|23.9.173.129|:80... connected.
HTTP request sent, awaiting response... Read error (Connection timed out) in headers.
Giving up.

ERROR: demo-videos-0.1-r0 do_fetch: Fetcher failure for URL: 'http://www.renesas.com/jp/ja/img/products/media/auto-j/microcontrollers-.... Unable to fetch URL from any source.
ERROR: demo-videos-0.1-r0 do_fetch: Function failed: base_do_fetch
ERROR: Logfile of failure stored in: /home/guest/user_work/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/demo-videos/0.1-r0/temp/log.do_fetch.22748
ERROR: Task (/home/guest/user_work/build/../meta-rzg-demos/meta-rzg1/qt-hmi-demo/recipes-demos/demo-videos_0.1.bb:do_fetch) failed with exit code '1'
NOTE: Tasks Summary: Attempted 3523 tasks of which 3521 didn't need to be rerun and 1 failed.

Summary: 1 task failed:
/home/guest/user_work/build/../meta-rzg-demos/meta-rzg1/qt-hmi-demo/recipes-demos/demo-videos_0.1.bb:do_fetch
Summary: There was 1 WARNING message shown.
Summary: There were 3 ERROR messages shown, returning a non-zero exit code.

返信遅くなり申し訳ございません。
お陰様で何とかコマンド実行の目処が立ちそうです。
毎度ご丁寧な対応誠にありがとうございました。